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_____of the warm water _____already been used up.
A.Two-third;hasB.Two-third;have
C.Two-thirds;hasD.Two-thirds;have
C

试题分析:英语中一般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。由分数修饰的主语后面谓语动词的数,和被修饰主语的单复数保持一致。选项AB结构有误,the warm water表示抽象含义,不可数,故谓语动词用单数,选C。
点评:英语分数的表达规则比较固定,学习中应牢记这些基本规则。需注意的是,由分数修饰的主语后面谓语动词的数,和被修饰主语的单复数保持一致。
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