问题
选择题
---What _________ to the building? ---It _________ when all the people were sleeping.
A．has happened; was broken in
B．was happening; was broken down
C．was happened; broke into
D．happened; was broken into
答案
D
题目分析：考查动词短语。句意 这个建筑物发生什么事了？当人们睡觉时，门被撞开了。问的发生了什么事，故一般过去时。第二空考 break into 破门而入，故用被动语态。所以选D项。