Inthe20thcentury,greatchanges_____

发布时间：2020-07-27 17:32:36

In the 20th century, great changes ________ in our country, ________ is developing very fast. A.took place; whichB.have taken place; whereC.have happened; whichD.took place; that

网友回答

A解析take place“发生”，表示有预见的发生．后者为非限定性定语从句只能用which引导．
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