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【题目】Everybody should make _____ effort to reduce pollution and create a clean environment.

A.aB.anC.theD.不填

【答案】B

【解析】

句意:每个人都应该努力减少污染,创造一个清洁的环境。

考查冠词。a一个,不定冠词,用在辅音音素开头的单词前;an一个,不定冠词,用在以元音音素开头的单词前;the定冠词,表特指,根据固定搭配make an effort“作出努力”effort是以元音音素开头的单词,所以前面要用不定冠词an,故选B

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