A. taller than
B. so tall as
C. the tallest
D. tallest
A. sold
B. has sold
C. has sold
D. were selling
A. has been studying
B. studies
C. studied
D. had been studying
A. fill
B. filling
C. filled
D. to be filled
A. since 5 years
B. for 5 years
C. 5 years before
D. during 5 years.
A. studies
B. is studying
C. studied
D. had studied
A. has been learning
B. has learned
C. learns
D. learned
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