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Great changes___in our country during the past 20 years.A.have happened B.happenedC.have been happened D.were happened
题目详情
Great changes___in our country during the past 20 years.
A.have happened B.happened
C.have been happened D.were happened
A.have happened B.happened
C.have been happened D.were happened
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答案和解析
A
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