Question

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

Answer 1

D

試題分析：句意：這條河太難聞了。必須阻止人們朝里面傾倒垃圾。Prevent sb from doing sth意為“阻止某人做某事”；根據(jù)句意可知應該是人們被阻止去做某事，B項缺少賓語；故選D。