Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks. Most educational specialists believe that early schooling should provide children with an (27)_____ of their own abilities and the self-confidence to use their abilities. One approach recognised by many (28)______ as promoting these qualities is the Montessori method, first practised by Maria Montessori of Italy in the early 1900s. Nancy McCormick Rambusch is credited with (29) ______ the method in the United States, where today there are over 400 Montessori schools. The method helps children learn for themselves by (30) ______ them with instructional materials and tasks that facilitate acts of discovery and manipulation. Through such exploration, children develop their sense of touch and learn (31)______ to do everyday tasks without adult assistance. Other benefits include improvement in language skills, and acquaintance with elements of science, music, and art. Question 30:

Mark the letter A, B, C or D on your answer sheet to indicate the most suitable respone to complete each of the following exchanges.Mary: “Our team has just won that English Competition.” - Anne: “_____”

A.

A. Good ideas. Thanks for the news.

B.

B. Well, that’s very surprising

C.

C. Yes, I guess it’s very good

D.

D. Yes, it’s our pleasure

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Facebook is a for-profit online social media and social networking service. The Facebook website was launched on February 4th, 2004 by Mark Zuckerberg, along with fellow Harvard College students and roommates. Since 2006, anyone age 13 and older has been allowed to become a registered user of Facebook though variations exist in minimum age requirement, depending on applicable local laws. Over 25 million people in the Uk use Facebook. That’s 45% of population! And on average, each user spends over six hours a month on Facebook. Though not the highest this is a considerable number. Is Facebook is a dangerous obsession or just harmless fun? Seventeen- year-old Bethan has written on her blog about what it was like to stop using Facebook. I think I am a Facebook addict. I log on to Facebook everyday to chat to my friends real friends and loads of online friends. Sometimes I have ten conversations going at the same time. I upload photos and update my Facebook profile all the time. But recently I’ve started to feel worried if I am offline for more than a few hours. And then last week I forgot to meet a real friend because I was online! I’ve realised I could have a problem. So I’ve decided to give it up for a while. I found it really hard. Facebook and my friends demanded to know why I had left. I spent the first few evenings wondering what everyone was chatting on Facebook. I even phoned a couple of friends to find out. The fourth night I wasn’t quite so bad. I actually concentrated on my homework better and I had more time to watch my TV programmes. And I spoke to my friends during the day at school. At the end of the first week, I reactivated my account, I think Facebook is fun and it’s useful for posting messages to friends and sharing photos. But I’ll try not to spend so much time on it in the future. Question: Which of the following is NOT true about Facebook users in UK?

A.

A. 45% of the country’s population used Facebook.

B.

B. More than 25 millions of Brits use Facebook.

C.

C. The amount of time British users spent on Facebook is highest.

D.

D. Averagely, 6 hours per month are spent by British users.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Facebook is a for-profit online social media and social networking service. The Facebook website was launched on February 4th, 2004 by Mark Zuckerberg, along with fellow Harvard College students and roommates. Since 2006, anyone age 13 and older has been allowed to become a registered user of Facebook though variations exist in minimum age requirement, depending on applicable local laws. Over 25 million people in the Uk use Facebook. That’s 45% of population! And on average, each user spends over six hours a month on Facebook. Though not the highest this is a considerable number. Is Facebook is a dangerous obsession or just harmless fun? Seventeen- year-old Bethan has written on her blog about what it was like to stop using Facebook. I think I am a Facebook addict. I log on to Facebook everyday to chat to my friends real friends and loads of online friends. Sometimes I have ten conversations going at the same time. I upload photos and update my Facebook profile all the time. But recently I’ve started to feel worried if I am offline for more than a few hours. And then last week I forgot to meet a real friend because I was online! I’ve realised I could have a problem. So I’ve decided to give it up for a while. I found it really hard. Facebook and my friends demanded to know why I had left. I spent the first few evenings wondering what everyone was chatting on Facebook. I even phoned a couple of friends to find out. The fourth night I wasn’t quite so bad. I actually concentrated on my homework better and I had more time to watch my TV programmes. And I spoke to my friends during the day at school. At the end of the first week, I reactivated my account, I think Facebook is fun and it’s useful for posting messages to friends and sharing photos. But I’ll try not to spend so much time on it in the future. Question: The highlight word “it” in the passage refers to_____.

A.

A. worrying

B.

B. facebook

C.

C. a problem

D.

D. meeting her real friend

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Facebook is a for-profit online social media and social networking service. The Facebook website was launched on February 4th, 2004 by Mark Zuckerberg, along with fellow Harvard College students and roommates. Since 2006, anyone age 13 and older has been allowed to become a registered user of Facebook though variations exist in minimum age requirement, depending on applicable local laws. Over 25 million people in the Uk use Facebook. That’s 45% of population! And on average, each user spends over six hours a month on Facebook. Though not the highest this is a considerable number. Is Facebook is a dangerous obsession or just harmless fun? Seventeen- year-old Bethan has written on her blog about what it was like to stop using Facebook. I think I am a Facebook addict. I log on to Facebook everyday to chat to my friends real friends and loads of online friends. Sometimes I have ten conversations going at the same time. I upload photos and update my Facebook profile all the time. But recently I’ve started to feel worried if I am offline for more than a few hours. And then last week I forgot to meet a real friend because I was online! I’ve realised I could have a problem. So I’ve decided to give it up for a while. I found it really hard. Facebook and my friends demanded to know why I had left. I spent the first few evenings wondering what everyone was chatting on Facebook. I even phoned a couple of friends to find out. The fourth night I wasn’t quite so bad. I actually concentrated on my homework better and I had more time to watch my TV programmes. And I spoke to my friends during the day at school. At the end of the first week, I reactivated my account, I think Facebook is fun and it’s useful for posting messages to friends and sharing photos. But I’ll try not to spend so much time on it in the future. Question: Facebook _______.

A.

A. was non-profitable

B.

B. was launched solely by Mark Zuckerberg.

C.

C. follows each country’s regulation.

D.

D. can be used by people of all ages.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Facebook is a for-profit online social media and social networking service. The Facebook website was launched on February 4th, 2004 by Mark Zuckerberg, along with fellow Harvard College students and roommates. Since 2006, anyone age 13 and older has been allowed to become a registered user of Facebook though variations exist in minimum age requirement, depending on applicable local laws. Over 25 million people in the Uk use Facebook. That’s 45% of population! And on average, each user spends over six hours a month on Facebook. Though not the highest this is a considerable number. Is Facebook is a dangerous obsession or just harmless fun? Seventeen- year-old Bethan has written on her blog about what it was like to stop using Facebook. I think I am a Facebook addict. I log on to Facebook everyday to chat to my friends real friends and loads of online friends. Sometimes I have ten conversations going at the same time. I upload photos and update my Facebook profile all the time. But recently I’ve started to feel worried if I am offline for more than a few hours. And then last week I forgot to meet a real friend because I was online! I’ve realised I could have a problem. So I’ve decided to give it up for a while. I found it really hard. Facebook and my friends demanded to know why I had left. I spent the first few evenings wondering what everyone was chatting on Facebook. I even phoned a couple of friends to find out. The fourth night I wasn’t quite so bad. I actually concentrated on my homework better and I had more time to watch my TV programmes. And I spoke to my friends during the day at school. At the end of the first week, I reactivated my account, I think Facebook is fun and it’s useful for posting messages to friends and sharing photos. But I’ll try not to spend so much time on it in the future. Question: Which of the following is NOT the thing Bethan does as a Facebook addict?

A.

A. be curious about Facebook activities when logging out.

B.

B. have numerous online conversation at the same time.

C.

C. use Facebook everyday

D.

D. long to be offline nearly all the time.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Facebook is a for-profit online social media and social networking service. The Facebook website was launched on February 4th, 2004 by Mark Zuckerberg, along with fellow Harvard College students and roommates. Since 2006, anyone age 13 and older has been allowed to become a registered user of Facebook though variations exist in minimum age requirement, depending on applicable local laws. Over 25 million people in the Uk use Facebook. That’s 45% of population! And on average, each user spends over six hours a month on Facebook. Though not the highest this is a considerable number. Is Facebook is a dangerous obsession or just harmless fun? Seventeen- year-old Bethan has written on her blog about what it was like to stop using Facebook. I think I am a Facebook addict. I log on to Facebook everyday to chat to my friends real friends and loads of online friends. Sometimes I have ten conversations going at the same time. I upload photos and update my Facebook profile all the time. But recently I’ve started to feel worried if I am offline for more than a few hours. And then last week I forgot to meet a real friend because I was online! I’ve realised I could have a problem. So I’ve decided to give it up for a while. I found it really hard. Facebook and my friends demanded to know why I had left. I spent the first few evenings wondering what everyone was chatting on Facebook. I even phoned a couple of friends to find out. The fourth night I wasn’t quite so bad. I actually concentrated on my homework better and I had more time to watch my TV programmes. And I spoke to my friends during the day at school. At the end of the first week, I reactivated my account, I think Facebook is fun and it’s useful for posting messages to friends and sharing photos. But I’ll try not to spend so much time on it in the future. Question: The word “applicable” in paragraph 1 is closest in meaning to_____.

A.

A. different

B.

B. unsuitable

C.

C. relevant

D.

D. opposite

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Facebook is a for-profit online social media and social networking service. The Facebook website was launched on February 4th, 2004 by Mark Zuckerberg, along with fellow Harvard College students and roommates. Since 2006, anyone age 13 and older has been allowed to become a registered user of Facebook though variations exist in minimum age requirement, depending on applicable local laws. Over 25 million people in the Uk use Facebook. That’s 45% of population! And on average, each user spends over six hours a month on Facebook. Though not the highest this is a considerable number. Is Facebook is a dangerous obsession or just harmless fun? Seventeen- year-old Bethan has written on her blog about what it was like to stop using Facebook. I think I am a Facebook addict. I log on to Facebook everyday to chat to my friends real friends and loads of online friends. Sometimes I have ten conversations going at the same time. I upload photos and update my Facebook profile all the time. But recently I’ve started to feel worried if I am offline for more than a few hours. And then last week I forgot to meet a real friend because I was online! I’ve realised I could have a problem. So I’ve decided to give it up for a while. I found it really hard. Facebook and my friends demanded to know why I had left. I spent the first few evenings wondering what everyone was chatting on Facebook. I even phoned a couple of friends to find out. The fourth night I wasn’t quite so bad. I actually concentrated on my homework better and I had more time to watch my TV programmes. And I spoke to my friends during the day at school. At the end of the first week, I reactivated my account, I think Facebook is fun and it’s useful for posting messages to friends and sharing photos. But I’ll try not to spend so much time on it in the future. Question: What does Bethan conclude about Facebook?

A.

A. The best use of Facebook is to share photos and messages.

B.

B. Facebook is not as good as TV.

C.

C. Users should spend more time on Facebook.

D.

D. Facebook is great as long as not too much time is spent on.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Facebook is a for-profit online social media and social networking service. The Facebook website was launched on February 4th, 2004 by Mark Zuckerberg, along with fellow Harvard College students and roommates. Since 2006, anyone age 13 and older has been allowed to become a registered user of Facebook though variations exist in minimum age requirement, depending on applicable local laws. Over 25 million people in the Uk use Facebook. That’s 45% of population! And on average, each user spends over six hours a month on Facebook. Though not the highest this is a considerable number. Is Facebook is a dangerous obsession or just harmless fun? Seventeen- year-old Bethan has written on her blog about what it was like to stop using Facebook. I think I am a Facebook addict. I log on to Facebook everyday to chat to my friends real friends and loads of online friends. Sometimes I have ten conversations going at the same time. I upload photos and update my Facebook profile all the time. But recently I’ve started to feel worried if I am offline for more than a few hours. And then last week I forgot to meet a real friend because I was online! I’ve realised I could have a problem. So I’ve decided to give it up for a while. I found it really hard. Facebook and my friends demanded to know why I had left. I spent the first few evenings wondering what everyone was chatting on Facebook. I even phoned a couple of friends to find out. The fourth night I wasn’t quite so bad. I actually concentrated on my homework better and I had more time to watch my TV programmes. And I spoke to my friends during the day at school. At the end of the first week, I reactivated my account, I think Facebook is fun and it’s useful for posting messages to friends and sharing photos. But I’ll try not to spend so much time on it in the future. Question: What happened to make Bethan decide to quit Facebook for a while?

A.

A. She forgot an offline meeting.

B.

B. She started to feel nervous.

C.

C. She had too many offline friends.

D.

D. She uploaded too many photos.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Facebook is a for-profit online social media and social networking service. The Facebook website was launched on February 4th, 2004 by Mark Zuckerberg, along with fellow Harvard College students and roommates. Since 2006, anyone age 13 and older has been allowed to become a registered user of Facebook though variations exist in minimum age requirement, depending on applicable local laws. Over 25 million people in the Uk use Facebook. That’s 45% of population! And on average, each user spends over six hours a month on Facebook. Though not the highest this is a considerable number. Is Facebook is a dangerous obsession or just harmless fun? Seventeen- year-old Bethan has written on her blog about what it was like to stop using Facebook. I think I am a Facebook addict. I log on to Facebook everyday to chat to my friends real friends and loads of online friends. Sometimes I have ten conversations going at the same time. I upload photos and update my Facebook profile all the time. But recently I’ve started to feel worried if I am offline for more than a few hours. And then last week I forgot to meet a real friend because I was online! I’ve realised I could have a problem. So I’ve decided to give it up for a while. I found it really hard. Facebook and my friends demanded to know why I had left. I spent the first few evenings wondering what everyone was chatting on Facebook. I even phoned a couple of friends to find out. The fourth night I wasn’t quite so bad. I actually concentrated on my homework better and I had more time to watch my TV programmes. And I spoke to my friends during the day at school. At the end of the first week, I reactivated my account, I think Facebook is fun and it’s useful for posting messages to friends and sharing photos. But I’ll try not to spend so much time on it in the future. Question: When she decided to give up Facebook_____.

A.

A. her friends didn’t care much

B.

B. she found it too difficult to continue.

C.

C. she made progress after some days

D.

D. she couldn’t focus on her homework

Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the three in the position of primary stress in each of the following questions.

A.

A. contribute

B.

B. accompany

C.

C. volunteer

D.

D. eliminate

Mark the letter A, B, C or D on your answer sheet to indicate the best answer of each following questions.“You stole my best cassette, Bob.” said Willy.

A.

A. Willy accused Bob on stealing his best cassette.

B.

B. Willy accused Bob for stealing his best cassette.

C.

C. Willy accused Bob at stealing his best cassette.

D.

D. Willy accused Bob of stealing his best cassette.

Mark the letter A, B, C or D on your answer sheet to indicate the best answer of each following questions.If you don’t have his number, you can’t phone him.

A.

A. You can phone him unless you have his number.

B.

B. You can’t phone him unless you have his number.

C.

C. You can phone him unless you don’t have his number.

D.

D. You can’t phone him unless you don’t have his number.

Mark the letter A, B, C or D on your answer sheet to indicate the best answer of each following questions.There are many things I want for Christmas. Some are clothes, toys and money.

A.

A. Clothes, toys and money are all the things I want for Christmas.

B.

B. If there are clothes, toys and money, I want them for Christmas.

C.

C. Although I want many things for Christmas, I have clothes, toys and money.

D.

D. There are many things I want for Christmas, including clothes, toys and money.

Mark the letter A, B, C or D on your answer sheet to indicate the best answer of each following questions.Tom and May never help at home. The reason is because their mother never asks to.

A.

A. Tom and May never help at home and their mother never asks to.

B.

B. Tom and May never help at home because their mother never asks to.

C.

C. Tom and May never help at home so their mother never asks to.

D.

D. In order not to help at home by Tom and May, their mother never asks.

Mark the letter A, B, C or D on your answer sheet to indicate the best answer of each following questions.Mr Pike is repairing the refrigerator in the kitchen at the moment.

A.

A. The refrigerator is being repaired in the kitchen at the moment by Mr Pike.

B.

B. The refrigerator is repaired in the kitchen by Mr Pike at the moment.

C.

C. The refrigerator is being repaired in the kitchen by Mr Pike at the moment.

D.

D. The refrigerator is being repaired at the moment by Mr Pike in the kitchen.

Mark the letter A, B, C, D on your answer sheet to indicate the word whose underlined part differs from that of the other three in pronunciation in each of the following questions:

A.

A. looked

B.

B. stopped

C.

C. closed

D.

D. watched

Mark the letter A, B, C, D on your answer sheet to indicate the underlined part that needs correction in each of the following questions:A lot of rice were exported to France last year.

A.

A. were

B.

B. to

C.

C. A lot of

D.

D. exported

Mark the letter A, B, C, D on your answer sheet to indicate the underlined part that needs correction in each of the following questions:If you think carefully before making your decision, you will avoid to get into trouble later.

A.

A. to get

B.

B. later

C.

C. carefully

D.

D. making

Mark the letter A, B, C, D on your answer sheet to indicate the underlined part that needs correction in each of the following questions:The books writing by Mark Twain are very popular in the world.

A.

A. very

B.

B. by

C.

C. in

D.

D. writing

Mark the letter A, B, C or D on your answer sheet to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following.The teacher gave some suggestions on what would come out for the examination.

A.

A. symptoms

B.

B. demonstrations

C.

C. effects

D.

D. hints

Mark the letter A, B, C or D on your answer sheet to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following.When being interviewed, you should concentrate on what the interviewer is saying or asking you.

A.

A. relate on

B.

B. be interested in

C.

C. impress on

D.

D. pay attention to

Mark the letter A, B, C or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.A chronic lack of sleep may make us irritable and reduce our motivation to work.

A.

A. calm

B.

B. uncomfortable

C.

C. miserable

D.

D. responsive

Mark the letter A, B, C or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.He had never experienced such discourtesy towards the president as it occurred at annual meeting in May.

A.

A. encouragement

B.

B. rudeness

C.

C. measurement

D.

D. politeness

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks. Most educational specialists believe that early schooling should provide children with an (27)_____ of their own abilities and the self-confidence to use their abilities. One approach recognised by many (28)______ as promoting these qualities is the Montessori method, first practised by Maria Montessori of Italy in the early 1900s. Nancy McCormick Rambusch is credited with (29) ______ the method in the United States, where today there are over 400 Montessori schools. The method helps children learn for themselves by (30) ______ them with instructional materials and tasks that facilitate acts of discovery and manipulation. Through such exploration, children develop their sense of touch and learn (31)______ to do everyday tasks without adult assistance. Other benefits include improvement in language skills, and acquaintance with elements of science, music, and art. Question 27:

A.

A. awarenes

B.

B. attitude

C.

C. attention

D.

D. knowledge

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks. Most educational specialists believe that early schooling should provide children with an (27)_____ of their own abilities and the self-confidence to use their abilities. One approach recognised by many (28)______ as promoting these qualities is the Montessori method, first practised by Maria Montessori of Italy in the early 1900s. Nancy McCormick Rambusch is credited with (29) ______ the method in the United States, where today there are over 400 Montessori schools. The method helps children learn for themselves by (30) ______ them with instructional materials and tasks that facilitate acts of discovery and manipulation. Through such exploration, children develop their sense of touch and learn (31)______ to do everyday tasks without adult assistance. Other benefits include improvement in language skills, and acquaintance with elements of science, music, and art. Question 28:

A.

A. researcher

B.

B. teacher

C.

C. tutors

D.

D. experts

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks. Most educational specialists believe that early schooling should provide children with an (27)_____ of their own abilities and the self-confidence to use their abilities. One approach recognised by many (28)______ as promoting these qualities is the Montessori method, first practised by Maria Montessori of Italy in the early 1900s. Nancy McCormick Rambusch is credited with (29) ______ the method in the United States, where today there are over 400 Montessori schools. The method helps children learn for themselves by (30) ______ them with instructional materials and tasks that facilitate acts of discovery and manipulation. Through such exploration, children develop their sense of touch and learn (31)______ to do everyday tasks without adult assistance. Other benefits include improvement in language skills, and acquaintance with elements of science, music, and art. Question 29:

A.

A. popular

B.

B. popularity

C.

C. popularize

D.

A.

A. giving

B.

B. instructing

C.

C. sending

D.

D. providing

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks. Most educational specialists believe that early schooling should provide children with an (27)_____ of their own abilities and the self-confidence to use their abilities. One approach recognised by many (28)______ as promoting these qualities is the Montessori method, first practised by Maria Montessori of Italy in the early 1900s. Nancy McCormick Rambusch is credited with (29) ______ the method in the United States, where today there are over 400 Montessori schools. The method helps children learn for themselves by (30) ______ them with instructional materials and tasks that facilitate acts of discovery and manipulation. Through such exploration, children develop their sense of touch and learn (31)______ to do everyday tasks without adult assistance. Other benefits include improvement in language skills, and acquaintance with elements of science, music, and art.Question 31:

A.

A. how

B.

B. what

C.

C. that

D.

D. which

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood. The scientists think that the vibrations are created when the water columns inside tubes that run along the length of the tree break, a result of too little water following through them. These fractured columns send out distinctive vibration patterns. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, and they experience thermal changes, so insects could be responding to something other than sound”, one scientist said. Question: All the following are mentioned as possible factors in drawing insects to weakened trees EXCEPT______.

A.

A. thermal changes

B.

B. sounds

C.

C. changes in color

D.

D. smells

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood. The scientists think that the vibrations are created when the water columns inside tubes that run along the length of the tree break, a result of too little water following through them. These fractured columns send out distinctive vibration patterns. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, and they experience thermal changes, so insects could be responding to something other than sound”, one scientist said. Question: It can be inferred from the passage that research concerning the distress signals of trees______.

A.

A. has been unproductive up to now

B.

B. is no longer sponsored by the government

C.

C. was conducted many years ago

D.

D. is continuing