◎ 题干
The rain started an hour ago. It's still raining now. It             for one hour.  

A. rained                      
B. rains  
C. is going to rain              
D. has been 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“The rain started an hour ago. It's still raining now. Itfor one hour. [ ]A. rainedB. rains C. is going to rain D.has been raining…”主要考查了你对  【现在完成进行时】  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。