The two friends ______on the Internet for three hours, and they would go on till the next morning.
A．have been chattingB．had been chatting
C．were chattingD．had chatted
A
考察時態(tài)。根據(jù)后面的for three hours可知是與完成時連用。B項是過去完成時，應(yīng)該有明顯的時間狀語，本題沒有。根據(jù)句意可知A正確。句意：那兩個朋友一直在網(wǎng)上聊了3個小時。
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