—About of the students made such a choice? Life is far more important, isn't it?
—Wonderful! of the land covered with trees and grass.
—Yes. The gravity on Mars is only about of that on the Earth.
— Well, we'd better eat up the rest as soon as possible.
—I'm afraid so. Three(fifth)of them wear glasses.
—Really? ______ will interest you, ______ of the books will be cost free here.
— So, the boys are only about of all.