2. 外语
  3. He must have had an accident, or he______then.

He must have had an accident, or he______then.

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问题 He must have had an accident, or he______then.
选项 A、would have been here
B、had to be here
C、should be here
D、would be here
答案A
解析 虚拟语气题。与过去事实相反的假设，主句谓语常用would／should havedone，从句用过去完成时。
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