Look!the ground is wet.It must have rained last night,______

Look!the ground is wet.It must have rained last night,_______?
A.hasn’t it
B.didn’t it
C.mustn’t it
D.hadn’t it

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答案B
考查反义疑问句.对于情态动词+have+done的反义疑问句有两种情况,1.情态动词+have+done后面没有过去式的时间状语,就对现在完成时提问.2.情态动词+have+done后面有过去时的时间状语,就对过去时反问.本题must have rained后面有过去时的时间状语,所以就对过去时反问,答案为B.

1年前

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