we should do our best to prevent our earth___.A being polluted B from polluting 答案是a 为什么?

问题描述:

we should do our best to prevent our earth___.
A being polluted B from polluting
答案是a 为什么?

被污染,省略了from.又是介词,后加being

是 from pollution 吧 。。。总觉得两个都不对。。

A
prevent.from doing(from 可以省略)
阻止...发生
这里我们应该尽全力阻止我们的地球被污染
是被污染,被动