Great changes ______ in the past ten years in China.

A. took place
B. have taken place
C. were taking place
D. had taken place
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科目：初中英語(yǔ) 來(lái)源：0115 期中題 題型：單選題

Great changes ______ in the past ten years in China.
[     ]
A. took place
B. have taken place
C. were taking place
D. had taken place

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