单项选择题

Robert is said ()abroad, but ! don't know what country he studied in.

A. to have studied
B. to stay
C. to be studying
D. to have been studying

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单项选择题
Some of the crops failed.(), the cotton did pretty well.

A. Then
B. Besides
C. Therefore
D. However
单项选择题
That town was no longer the sleepy little village().

A. it has been being
B. it has been
C. it was
D. it had been
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