题目内容

About ________ of the workers in the factory were born in the ________.
A.two-thirds, 1970B.two-thirds, 1970s
C.two-third,1970D.two-third, 1970s
B
基数词+序数词的复数形式(基数词大于1),in the 年的复数形式表示在…年代,故选B
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