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The two friends ______on the Internet fo...

The two friends ______on the Internet for three hours, and they would go on till the next morning.

A.have been chatting

B.had been chatting

C.were chatting

D.had chatted

 

A 【解析】考察时态。根据后面的for three hours可知是与完成时连用。B项是过去完成时,应该有明显的时间状语,本题没有。根据句意可知A正确。句意:那两个朋友一直在网上聊了3个小时。
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