问题
选择题
About ________ of the workers in the factory were born in the ________.
A．two-thirds, 1970
B．two-thirds, 1970s
C．two-third,1970
D．two-third, 1970s
答案
答案：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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