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9．Fourfifthsof the world's telephone calls are made in English．（five）

分析世界上五分之四的電話是在英國制造的．

解答答案：fifths．
在英語分數中，用基數詞表示分子，序數詞表示分母．如果分子大于一的話，分母序數詞要用復數形式，根據"Four_____of the world's telephone calls"可知五分之四的電話是在英國制造的，分子是four，大于一，所以分母要用復數形式，結合給出的英語提示five，起序數詞是fifth，所以要用fifths，故填fifths．

點評首先要掌握英語分數的表達法，然后結合具體的題目，就可以確定正確答案．

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