The ground was wet and ________ last night.
The ground was wet and ________ last night.
A.it must be mining
B.there must have rain
C.it must have rained
D.there might have been rain
答案及解析： C
The ground was wet and ________ last night.
A.it must be mining
B.there must have rain
C.it must have rained
D.there might have been rain
答案及解析： C