many rivers have been made ___these yearsA.dirty B.to dirty C .be_英语解答

many rivers have been made ___these years
A.dirty B.to dirty C .be dirty D.to be dirty

人气：382 ℃　时间：2020-03-30 08:44:58

解答

A 这些年来,很多河里的水都被污染了.　　为什么不是D，能讲一下区别或原因吗，谢谢be made + 形容词这是固定搭配，记住才能会。