题目内容
（请给出正确答案）
Since this road is wet and slippery this morning, it ______ last night.
A．must rain
B．was raining
C．must have rained
D．may rain
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Since the advent of the motor car, road accidents have increased dramatically.
A．approach
B．inauguration
C．introduction
D．initiation
A．withdrawing
B．deleting
C．competing
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A.contradicting
B.protesting
C.provoking
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A.lawn
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D.trail
A.it must rain
B.it must be raining
C.it must have rained
D.it must have been rained
Since the road is wet this morning, ______ last night.
A．it must rain
B．it has rained
C．it must have rained
D．it must have been rained
Since the road is wet this morning, ______last night.
A．it must rain
B．it must be mining
C．it must have rained
D．it must have been rain
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