问题
选择题
The river smells terrible. People must_____ dirty things into it.
A.be prevented to throw
B.prevent from throwing
C.prevent to throw
D.be prevented from throwing
答案
答案:D
题目分析:句意:这条河太难闻了。必须阻止人们朝里面倾倒垃圾。Prevent sb from doing sth意为“阻止某人做某事”;根据句意可知应该是人们被阻止去做某事,B项缺少宾语;故选D。