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
表示几分之几,应该是基数词—+序数词的复数(单复数形式要根据基数词来决定),而in the +年后接s,故选答案B
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