英语作文:比较一下过去的大同和现在的大同有什么不同.用上used to和but now的句型.

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英语作文:比较一下过去的大同和现在的大同有什么不同.用上used to和but now的句型.

i think Datong is very dirty.when i sat on somewhere ,i used to put a paper on there and then i could sat down and did something i like.but now,Datong become very clean ,there is no anything dirty.the...