选哪个,请给出原因.Having been attacked by terrorists,________.

问题描述:

选哪个,请给出原因.Having been attacked by terrorists,________.
A.doctors came to their rescue B.the tall building collapsed C.an emergency measure was taken D.warnings were given to tourists.

B:这里题目部分在句中作伴随状语,而它的逻辑主语是整个句子的主语.自然是房屋被攻击然后爆炸.逻辑主语是一致的
不懂的还可以再问我