问题补充:
There great changes in our city in the past 10 years.
A. were
B. had
C. have been
D. have had
答案:
A. were
B. had
(答案→)C. have been
D. have had
解析:句意:在过去的里,我们的城市发生了很大的改变。in the past 10 years是现在完成时的标志词,用现在完成时,故选C.
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