About of the workers in the factory were born in .
A. three-fifths, 1970s
B. three- fifths, the 1970s
C. three- fifth, the 1970s
D. three- fifth, 1970
网友回答
A. three-fifths, 1970s
B. three- fifths, the 1970s
C. three- fifth, the 1970s
D. three- fifth, 1970
解析：英语中一般用基数词表示分数的分子，用序数词表示分数的分母。当分子是一时，分数的分母用单数形式，在表示分数时，当分数的分子大于一时，分数的分母要用复数形式。句意：这个工厂的大约五分之三的工人出生在七十年代。结合语境可知下文特指某个年代，故需用定冠词，选项CD结构有误，故选B。