题目内容
Unluckily, we missed the train. we early.
| A．must have set out | B．had set out |
| C．should have set out | D．set out |
C
解析试题分析：考查情态动词+完成式的用法：句意：不巧的是，我们错过了火车，我们本应该早点出发的。从we missed the train可知我们没有早出发，所以用should have done过去本应该做却没有，must have done过去一定做了..，选C。
考点：考查情态动词+完成式的用法
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| A．can | B．could | C．must | D．should |
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