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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

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

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

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; 1970