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_______of the class_______ finished the homework already.
A.Two third, hasB.Two thirds, have
C.Two thirds, hasD.Second threes, have
B

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。句意:这个班的三分之二的人影完成了作业。根据分析可知选项AD结构有误,本句主语the class为单数形式,故选B。
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,当句子主语被分数修饰时,谓语动词和被修饰主语的单复数保持一致。
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