Unfortunately, I might have to leave for Boston …………….
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B.
B. density, solar activity
C.
C. density, but solar activity
D.
D. density and activity of the Sun is
A.
A. his character and personality are hard to visualize
B.
B. is difficult to discover his character and personality
C.
C. picturing his personality and character are hard things
D.
D. you can’t figure out his personality and character