China has changed a lot in the past fifty years.同义句

China has changed a lot in the past fifty years.同义句

题目
China has changed a lot in the past fifty years.同义句
改为lots of changes to china in the past fifty years
答案
China has changed a lot since fifty years ago.There have been lots of changes to China in the past fifty years.注意:changes是可数 的复数,所以前面用lots of ,所以前面是 have been.
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