问题描述：
是there be sth to be done还是there be sth being done?
there be sth in doing和there be sth being done有什么区别?谢
there are many advantages to purchasing things online.怎么成了to doing了？
there be sth in doing和there be sth being done有什么区别?谢
there are many advantages to purchasing things online.怎么成了to doing了？
问题解答：
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