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China's reform and opening has been going on for ________ is like about 30 years now and it's really quite remarkable.

A.that B.which C.what D.it

 

C

【解析】考查名词性从句。句意:中国的改革开放现在已经进行了大约三十年,效果非常明显。________ is like about 30 years now是介词for的宾语,该部分缺少主语,所以选起双重作用的what。

 

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