It ______ have rained last night, for the ground is wet.A、willB、canC、shouldD、

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问题 It ______ have rained last night, for the ground is wet.

选项 A、will
B、can
C、should
D、must

答案 D

解析句意：地上潮湿，昨晚一定下了雨。该题考查的是情态动词。must+动词不定式的完成式表示对过去情况的推测。

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