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    【題目】About ________ of the students have already gone to the mountain village.

    A.second fifthB.two fifthsC.two fifthD.second five

    【答案】B

    【解析】

    句意:大約五分之二的學生已經(jīng)去山村去了。

    考查分數(shù)表達法。分數(shù)的表達方法:分子用基數(shù)詞,分母用序數(shù)詞,two是基數(shù)詞,second是序數(shù)詞,故排除A、D項;當分子大于1的時候,分母要用復數(shù),five是基數(shù)詞,fifth是序數(shù)詞,所以分母用fifth,當分子大于1時,分母要用復數(shù)形式fifths,故排除C項。故選B

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