Our teacher should have attended the evening party last night: he______too much work to do.

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问题 Our teacher should have attended the evening party last night: he______too much work to do.

选项 A、must have had
B、had to have
C、must have
D、had had

答案A

解析句意：我们的老师昨晚应该参加晚会的；他一定有太多的工作要做了。结合语境可知，此处表示对过去的事情的肯定推测，应该用must have done结构。故正确答案为A。

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A类竞赛（研究生）

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