After Beijing Olympic Games,the city has changed a lot and looks different ( )it used to be.

题目

After Beijing Olympic Games,the city has changed a lot and looks different ( )it used to be.
这是什么从句?为什么填WHAT?从句前没有什么连接的吗?

答案

...looks different后少了介词from应该是：After Beijing Olympic Games,the city has changed a lot and looks different from (what) it used to be.what在此引导宾语从句,做介词from的宾语.空格中所填内容既要可...