题文
It _ __ last night，for the ground was wet this morning.
| A．must have rained | B．may have rained |
| C．must rain | D．might rain |
推荐试卷
It _ __ last night，for the ground was wet this morning.
| A．must have rained | B．may have rained |
| C．must rain | D．might rain |
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