题目内容
20．---How many students are there in your class？---Forty，and ________ of us are girls．（ ）
| A． | three fifths | B． | three fifth | C． | third five | D． | third fifths |
分析 翻译：---你们班有多少学生？
---40人，我们当中有五分之三的是女生．
解答 答案：A．英语中分数的表达，先说分子数后说分母数，用基数词表示分数的分子，用序数词表示分数的分母．当分子是一时，分数的分母用单数形式，在表示分数时，当分数的分子大于一时，分数的分母要用复数形式，因此五分之三应该表达成three fifths，故选A．
点评 本题考查的是英语中分数的表达，先说分子数后说分某数，用基数词表示分数的分子，用序数词表示分数的分母．当分子是一时，分数的分母用单数形式，在表示分数时，当分数的分子大于一时，分数的分母要用复数形式．
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