Question

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．have been wiped out	D．had been wiped out

Answer 1

C

解析试题分析：考查时态及语态。根据句中的时间状语in the past 50 years在过去的50年，故用现在完成时。再根据courtyard houses与wipe out为被动关系，故用被动语态。句意：据报道，在过去的50年中，大约80的北京四合院被摧毁。故C正确。
考点：考查时态及语态