题目内容：

Today,the forests have amost gone,peoplemust ___down many trees.A.stop to cut B.stop from cuting C.be stopped from cuting D.be stopped to cut

优质解答

C.逻辑上人类是被阻止砍树的,因此要用被动.
stop (from) doing阻止某人做某事
keep sb. from doing 也可以但是from不可省.