About_of the students in Grade Nine this year were born in the _
问题描述：
About_of the students in Grade Nine this year were born in the _
A.three five;1996
B.three fifths;1990s
C.third fifth;1997
D.third fifths;1990s
并说明理由
答
选择B
解析：分子用基数词three,分母用序数词fifth,当分子大于一时,分母的序数词后面加s,故有three fifths来表达三分之五.
in + 年份
in the + 年代
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