◎ 题干
The two friends _____ on the Internet for three hours, and they would go on till the next morning.
A.had been chatting B.had chatted C.were chatting D.has been chatting
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The two friends _____ on the Internet for three hours, and they would go on till the next morning. A.had been chattingB.had chattedC.were chattingD.has been cha…”主要考查了你对  【过去完成时】【过去完成时的被动语态】  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。