问题
选择题
About_______ of the books in our school library________ written in English.
A．one-fifth, are
B．one-fifths, is
C．one-fifth, is
D．first-fifth, are
答案
A
题目分析: 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