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【题目】I think QQ is an invention ________ can help us communicate with others on line freely.

A.whatB.whichC.whoseD.who

【答案】B

【解析】

句意:我认为QQ是一项可以帮助我们与他人在网上自由交流的发明。

考查定语从句。what可引导名词性从句;which可引导定语从句,指物,作主语/宾语;whose可引导定语从句,指人/物,作定语;who可引导定语从句,指人,作主语/宾语。分析句子可知,此处是定语从句,先行词是“invention”指物,引导词用于句中作主语。故选B

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