Since this road is wet and slippery this morning, it ______ last night.

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问题 Since this road is wet and slippery this morning, it ______ last night.

选项 A、must rain
B、was raining
C、must have rained
D、may rain

答案C

解析本题考查情态动词+完成时的用法，表示对已经发生的亭储的肯定猜测。本句的意思是：“既然今天早晨路上又湿又滑，昨晚肯定下雨了。”

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成人本科学位英语

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