问题
选择题
It _ __ last night，for the ground was wet this morning.
A．must have rained
B．may have rained
C．must rain
D．might rain
答案
答案：A
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It _ __ last night，for the ground was wet this morning.
A．must have rained
B．may have rained
C．must rain
D．might rain
答案：A