Question

【题目】The river smells terrible. People must __ dirty things into it.

A. be stopped to throw B. be stopped from throwing

C. stop to throw D. stop from throwing

Answer 1

【答案】B

【解析】

句意“河水很难闻，人们必须被阻止往河里扔东西”。stop to do停下来去做另一件事，与句意不符，排除A和C。stop sb from doing阻止某人做某事，且主语people与stop之间为被动be done，空前有情态动词，用动词原形，故选B。