great changes ---in china since the people's republic of china ---in 1949
A.havetakenplace;wasfoundedB.hastakenplace;wasfoundedC.havebeentakenplace;foundedD.to...
A.have taken place;was founded
B.has taken place ;was founded
C.have been taken place;founded
D.took place;founded 展开
B.has taken place ;was founded
C.have been taken place;founded
D.took place;founded 展开
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