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
网友回答
A. had wiped out
B. have wiped out
C. had been wiped out
(答案→)D. have been wiped out
解析：可联系答.案.网客服索取。