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4.         World Expo is regarded as the Olympic Games of the economy,science and technology,         expert said.(  )
A.A; anB.The; anC.The; aD.A; the

分析 一位专家说,世博会被认为是经济和科技的奥运会.

解答 答案:B
题干中the World Expo世博会,专有名词;句中expert表示泛指某一位专家,要用不定冠词来限定;expert是元音开头的单词,要用an.故选B.

点评 冠词是一种虚词,本身不能独立使用,只能放在名词前帮助说明名词所指的人或事物,它是英语词性中最小的一类,只有三个,一种是不定冠词a,an;一种是定冠词the.此外也有些特定场合不用冠词,即通常所称的零冠词.不定冠词表示泛指,定冠词表示特指.

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