问题 选择题

The thief ________ in from the kitchen window as the door was closed.

A.may climb

B.must have climbed

C.could have climbed

D.should have climbed

答案

D

问句中使用了过去时态,说明动作发生在“过去”;A、C项表示“现在”或者“将来”,排除。must不能和完成时一起用于疑问句,排除。这里should have done表示应该做某事而没有做,带有批评的口气。

单项选择题 A3/A4型题
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