many rivers have been made ___these years
问题描述:
many rivers have been made ___these years
A.dirty B.to dirty C .be dirty D.to be dirty
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。