题目内容

About_______ of the books in our school library________ written in English.
A．one-fifth, areB．one-fifths, isC．one-fifth, isD．first-fifth, are
A

试题分析: 句意：我们校图书馆五分之一的书是用英语写的。分数用基本数词表示分子，序数词表示分母，分母大于1时分母加s; books书，可数名词复数，其谓语动词为复数，故选A
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