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

A.a; aB.a; the

C.the; aD.the; the

【答案】A

【解析】

句意: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。

考查冠词的用法。 a/an均可修饰单数可数名词,表示泛指,相当于onea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,蓝色的天空没有污染的环境均表示泛指;blueless为辅音发音开头的词,故应选A

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