—How many boys are there in our school? 

 —In our class, ___________of the students are boys.

      A. three fifths              B. third fifths            C. three fifth

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

______ of the students in my class plan to go abroad for ______ study in the future.

       of the land is covered with trees and grass in Pingjiang, Yueyang.
A. Three fives             B. Three fifths            C. Three fifth

In India,about_____ of people live in the country and some of them live a very poor life.

A.three fifth B.third fifth C.third fifths D.three fifths