Great changes_____(take) place in the past 30 years.

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Greatchanges_____(take)placeinthepast30years.Greatchanges_____(take)placeinthepast30years.Greatchang

Great changes_____(take) place in the past 30 years.
Great changes_____(take) place in the past 30 years.

Great changes_____(take) place in the past 30 years.
have taken,主要题是想考你用不用被动语态,take place 是没有的.

has taken

have taken

had taken