They were heard ______ in the next room every night.
题目
They were heard ______ in the next room every night.
A.talking B.to talk
答案
B to talk
根据题意:他们每天晚上都被听到在谈论.
原句:We heard them talk in the next room every night ( heard sb.do sth)
被动语态:They were heard to talk in the next room every night
heard sb.doing sth 是指在某一个时间点发生的事情.
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