It_____yesterday, for the ground is still wet now.A、must have rainedB、was raini

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问题 It_____yesterday, for the ground is still wet now.

选项 A、must have rained
B、was raining
C、rained
D、had rained

答案 A

解析 must have done表示对过去发生的事情的肯定推测。

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