Great changes ______(take place) in China since the People’s Republic of China was founded in 1949.

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问题 Great changes ______(take place) in China since the People’s Republic of China was founded in 1949.

选项

答案have taken place

解析 由后面since从句可知谓语动词应用现在完成时态;take place不用被动形式。
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