Since the road is wet this morning, ____
题型:选择题
问题:
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
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