问题
选择题
The ground is wet. It must have rained last night, ______it?[ ]
A. hasn't
B. wasn't
C. didn't
D. mustn't
答案
答案:C
The ground is wet. It must have rained last night, ______it?[ ]
A. hasn't
B. wasn't
C. didn't
D. mustn't
答案:C