Great changes in China in the last two decades.A. have taken placeB. took placeC. have be

问题补充：

Great changes in China in the last two decades.

A. have taken place

B. took place

C. have been taken place

D. are taking place

答案：

(答案→)A. have taken place

B. took place

C. have been taken place

D. are taking place

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