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6．---How many girls are there in your class？
---______ of the students are girls．（　　）

A．

One seconds

B．

one third

C．

two third

D．

one ninths

分析 --你們班有多少個女生？
--三分之一的學生是女生．

解答答案：B．
分數(shù)的表達形式為：基數(shù)詞（分子）+序數(shù)詞（分母），分子大于一時分母加s．根據(jù)本規(guī)則，只有one third三分之一正確．故選B．

點評本題考查分數(shù)的用法，考生在掌握基礎知識的基礎上結(jié)合語境可正確作答．

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