( ) Friends of the Earth can keep the environment ____.A.cleaned B.clean C.cleaning D.cleanly

问题描述:

( ) Friends of the Earth can keep the environment ____.A.cleaned B.clean C.cleaning D.cleanly

正确:B clean在此作形容词使用,表示“干净的”意思。

选B keep 后面+形容词表示一种状态

选B keep 是系动词 后面跟形容词 直接用clean