Question

【题目】We should do our best to prevent the river from __________.

A. pollute B. polluting C. be polluted D. being polluted

Answer 1

【答案】D

【解析】本题考查非谓语。句意“我们应该尽我们最大的努力保护河流免受污染”。固定搭配prevent ... from doing sth,排除A和C。又因为河流被污染，故选D。