问题补充：
Their house in the big fire, so they decided to build another one.
A. has been destroyed.
B. had destroyed
C. had been destroyed
D. destroyed
答案：
A. has been destroyed.
B. had destroyed
(答案→)C. had been destroyed
D. destroyed
解析：句意：这个房子在大火中被毁了，所以他们决定重建一个。从so they decided to build another one.可知destroy这个动作是发生在decided前面的，所以是过去的过去的动作，用过去完成时，选C.
