Question

Since the road is wet this morning,last night__________.

A.it must be raining
B.it must rain
C.it must have rained
D.it must have been rained

Answer 1

【答案】：C

本题考察动词时态的用法。题干中提到“The road is wet this morning”表示与现在相关，所以后面的动词应用完成时态，选项中的助动词“must”表示猜测，且其后动词用原形。