问题描述：
How happy they_if the earthquake measuring 8 scales hadnt broken out
A,could be B,would be C,should have been D were
请问B错在哪里呢,为什么答案是C
A,could be B,would be C,should have been D were
请问B错在哪里呢,为什么答案是C
问题解答：
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