Since the road is wet this morning,---------last night.

问题描述:

Since the road is wet this morning,---------last night.
A it must rain B it must have rainde C it must be raining D it must have been raining

B
过去完成时
昨晚一定下过雨了
A是一定要\会下雨
C是进行时态,排除
D是过去完成进行时,也排除