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______ is known to all, Taiwan is a part of China.

A.AsB.WhichC.ThatD.What

A

解析試題分析:考查定語從句。As指代一句話內(nèi)容,引導非限制性定語從句,位置很靈活,可以放在句首,句中,句末。Which引導的非限制性定語從句不能放在句首。That,what不能引導非限制性定語從句。故A正確。
考點:考查定語從句
點評:本題考查非限制性定語從句。As指代一句話內(nèi)容,引導非限制性定語從句,位置很靈活,可以放在句首,句中,句末。Which引導的非限制性定語從句不能放在句首。

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