Tomakerivers     thanbefore,everybodyissupposedtoprotec...

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Tomakerivers     thanbefore,everybodyissupposedtoprotec...

To make rivers      than before, everybody is supposed to protect them.

A. dirty               B. dirtier             C. clean               D. cleaner

【回答】

D

【解析】句意:为了使河流比以前更清洁,每个人都应该保护它们。A. dirty脏的;B. dirtier更脏的;C. clean干净的;D. cleaner更干净的。根据than判断,这是一个比较级的句子,排除A,C;根据“everybody is supposed to protect them.”可知,保护河流的目的是让它们更清洁干净,故*为D。

知识点:形容词比较级

题型:选择题

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