27.―Look! How dirty the river is! ―It clean before the factory was built nearby.A.used to be B.will be C.has been D.is 查看更多

 

題目列表(包括答案和解析)

一Look! How dirty the river is!

一It        clean before the factory was built nearby.

A.used to be    B.will be                 C.has been         D.is

查看答案和解析>>


同步練習(xí)冊(cè)答案