9. Great changes in our school in the past 5 years.A. took placeB. were taken placeC. hav

问题补充：

9. Great changes in our school in the past 5 years.

A. took place

B. were taken place

C. have taken place

D. have been taken place

答案：

A. took place

B. were taken place

(答案→)C. have taken place

D. have been taken place

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