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

          試題分析:英語中一般用基數(shù)詞表示分數(shù)的分子,用序數(shù)詞表示分數(shù)的分母。當分子是一時,分數(shù)的分母用單數(shù)形式,在表示分數(shù)時,當分數(shù)的分子大于一時,分數(shù)的分母要用復數(shù)形式。由分數(shù)修飾的主語后面謂語動詞的數(shù),和被修飾主語的單復數(shù)保持一致。選項AB結構有誤,the warm water表示抽象含義,不可數(shù),故謂語動詞用單數(shù),選C。
          點評:英語分數(shù)的表達規(guī)則比較固定,學習中應牢記這些基本規(guī)則。需注意的是,由分數(shù)修飾的主語后面謂語動詞的數(shù),和被修飾主語的單復數(shù)保持一致。
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