◎ 题干
—How did the accident happen?
—You know, it ______ difficult to see the road clearly because it ______.

[     ]

A. was; was raining
B. is; has rained
C. is; is raining
D. will be; will rain
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—How did the accident happen? —You know, itdifficult to see the road clearly because it . [ ]A. was; was raining B. is; has rained C. is; is raining D. …”主要考查了你对  【一般过去时】【过去进行时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。