题目内容
【题目】He must have had an accident, or he here then.
would have been
B. had been
C. should be
D. could be
【答案】A
【解析】句意:他一定是发生了事故,否则他那个时候应该已经到这儿了。or可以表示同过去事实相反的非真实条件,即or后面的句子用虚拟语气,谓语用would/could/might/should + have done。
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