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问题详情

-They are supposed to arrive at six ,but there is still no sign of them.-Something unexpected_________to them.

A、might happen

B、must have happened

C、would have happened

D、could happen

时间：2021-07-17 20:28 关键词：学历教育成人高考 2005年全国成人高考专升本英语真题及答案

答案解析

B

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