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【题目】 We can have ________ bluer sky if we create _________less polluted world.

A. a; a B. a; the

C. the; a D. the; the

【答案】A

【解析】

试题分析:句意为:如果我们营造一个没有污染的环境,我们就可以拥有一个蓝色的天空。a/an均可修饰单数可数名词,表示泛指,相当于one;a用于辅音发音开头的词前, an用于元音发音开头的词前。the表示特指说话双方都知道的人或物。根据语境可知,“蓝色的天空”和“没有污染的环境”均表示泛指;blue和less为辅音发音开头的词,故应选A。

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