—How many boys are there in our school? 
—In our class, ___________of the students are boys.
A. three fifths              B. third fifths           C. three fifth
：A
：分?jǐn)?shù)在英語中通常是借助于基數(shù)詞和序數(shù)詞來共同表達(dá)的。其中基數(shù)詞表示分子，序數(shù)詞表示分母。分子超過1，分母要加s.分?jǐn)?shù)修飾名詞時，若該名詞是不可數(shù)名詞只能用單數(shù)；若是可數(shù)名詞，用單數(shù)或復(fù)數(shù)均可。但是，若它們在句子中作主語，則謂語動詞是用單數(shù)還是復(fù)數(shù)取決于名詞，即與分?jǐn)?shù)所修飾的名詞保持一致。
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