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    精英家教网 > 高中英语 > 题目详情

    【题目】They didn't discover until they happened to enter the back room _________ someone had stolen the priceless painting.

    A.thatB.whatC.whichD.when

    【答案】A

    【解析】

    考查宾语从句连接词。句意：直到他们碰巧进入后屋，才发现有人偷了那幅无价的画。分析句子可知，“有人偷了那幅无价的画”在句中作动词discover的宾语，所以是宾语从句，从句缺少引导词，而宾语从句中又不缺少任何成分，所以用连接词that引导该宾语从句。因为that在名词性从句中不做成分，无词意，而其它几个选项都是要在从句中做一定的句子成分的。故选A。

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