Since the road is wet this morning,__last night.A.it must rainB.it must be rainingC.it must have rainedD.it must have been rain
Since the road is wet this morning,__last night.
A.it must rain
B.it must be raining
C.it must have rained
D.it must have been rain
B.it must be raining
C.it must have rained
D.it must have been rain
参考解析
解析：对过去发生的事作肯定的判断时，用must have done。
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