34. It’s reported that in the past 50 years around 80 percent of Beijing’s courtyard house

问题补充：

34. It’s reported that in the past 50 years around 80 percent of Beijing’s courtyard houses .

A. had wiped out

B. have wiped out

C. had been wiped out

D. have been wiped out

答案：

A. had wiped out

B. have wiped out

C. had been wiped out

(答案→)D. have been wiped out

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