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Great changes have taken place since then in the factory whe Great changes have taken place since then in the factory ___ Great changes have taken place since then in the factory (wh 7.great changes have taken place since then in the factory _ "Great changes have taken place in China since the introduct Great changes have taken place in my hometown since 1930. Great changes have taken place since liberation Great changes have taken place in China since the People’s R great changes have taken place in our school since the gover great changes have taken place in the village ____the years Great changes have taken place ...in china Great changes have taken place in China.