问题描述: we should do our best to prevent these rivers from _____(pollute)我不会, 1个回答 分类:英语 2014-11-16 问题解答: 我来补答 pollutingprevent sth from doing sth保护.免受.的侵害我们应该尽全力保护这些小河,避免被污染 展开全文阅读