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He had collected plenty of historical evidence,       proved that humans used to have different sleeping patterns.
A.thatB.whichC.itD.what
B

试题分析:考察定语从句。本题定语从句的先行词是plenty of historical evidence,后面的定语从句中的关系代词which指代先行词在句中作主语,that不能引导非限制性定语从句,it和what不能引导定语从句。句意:他已经收集了很多的历史证据,这些证据证明人类过去常常有不同的睡眠的方式。故B正确。
点评:解答定语从句的关键是分析句子成分,如果定语从句中句子成分很完整就使用关系副词来引导;如果句子缺少主语,宾语,表语或者定语的时候就使用关系代词。同时也要注意一些关系词的特殊用法,尤其是that/as的特殊用法,既要注意普遍性,也要注意特殊性。特别关注:whose是关系词中唯一的一个可以放在名词前面做定语的关系代词,如果缺少定语,用whose引导定语从句,或是of which the+名词/the+名词+of which。要特别注意which引导非限制性短语从句的用法。
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