Some old buildings and a new stadium for Nanjing Youth Olympic Games is being built

问题补充：

Some old buildings and a new stadium for Nanjing Youth Olympic Games is being built right there.

A. will be pulled down

B. have been pulled down

C. are pulled down

D. had been pulled down

答案：

A. will be pulled down

(答案→)B. have been pulled down

C. are pulled down

D. had been pulled down

解析：考查时态及语态。句意：一些旧建筑已经被推到，那儿正在建设一座为青年奥运会准备的新体育场。可知前文内容已经发生，且就建筑是动作的对象，故用完成时态，被动语态，选B。

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