【題目】—Look! There are many books on the shelves.

—And _________ of them are written in English.

A.two fifthsB.two fifthC.two five

【答案】A

【解析】

句意：——看！書架上有許多書�！渲形宸种怯糜⒄Z寫的。

考查分?jǐn)?shù)表達(dá)法。分?jǐn)?shù)的構(gòu)成：分子基數(shù)詞，分母序數(shù)詞，分子大于一，分母加-s。也就是說英語中一般用基數(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。選項(xiàng)B中的分子是二，但分母沒用復(fù)數(shù)形式；選項(xiàng)C中的分子和分母用的都是基數(shù)詞；只有選項(xiàng)A正確。故選A。

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