题目内容：

The water in the rive smells terrible,people must____dirty things into it
A.be stopped from throwing B.be stopped from to throw C.stopped to throw D.stop from throwing

优质解答

A
stop ...from doing sth 排除B与D
根据句意：是阻止人们扔脏东西入河,再排除D
加油!不明白再问!