◎ 题干
— How did the accident happen?
— You know, it        difficult to see the road clearly because it      .
A.is…was rainingB.was…had rainedC.is…is rainingD.was…was raining
◎ 答案
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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, it difficult to see the road clearly because it .A.is…was rainingB.was…had rainedC.is…is rainingD.was…was raining…”主要考查了你对  【一般现在时】【过去进行时】【过去完成进行时】  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。