关于英语被动语态的选择题

问题描述:

关于英语被动语态的选择题
Today the forests have almost gone.People must( ) down too many trees.
A.stop from cutting B.stop to cut C.be stopped from cutting
D.be stopped to cut
为什么选C呢,主语是people呀 就是选A为什么不行呢

C.be stopped from cutting
people是被阻止的,故要用被动语态,A 是主动语态.