About  ______ of the books in our school library are written in Chinese.
A．four-fifthB．four-fifths
C．fourth-fifthsD．fourths-fifth
B

試題分析：英語(yǔ)中一般用基數(shù)詞表示分?jǐn)?shù)的分子，用序數(shù)詞表示分?jǐn)?shù)的分母。當(dāng)分子是一時(shí)，分?jǐn)?shù)的分母用單數(shù)形式，在表示分?jǐn)?shù)時(shí)，當(dāng)分?jǐn)?shù)的分子大于一時(shí)，分?jǐn)?shù)的分母要用復(fù)數(shù)形式。根據(jù)分析可知選項(xiàng)ACD結(jié)構(gòu)有誤，故選B。
點(diǎn)評(píng)：英語(yǔ)分?jǐn)?shù)的表達(dá)規(guī)則比較固定，學(xué)習(xí)中應(yīng)牢記這些基本規(guī)則。需注意的是，由分?jǐn)?shù)修飾的主語(yǔ)后面謂語(yǔ)動(dòng)詞的數(shù)，和被修飾主語(yǔ)的單復(fù)數(shù)保持一致。
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