How often do you play tennis?
The number of the students in our school is about nine （ ）. （ ） of them are boys.
（A）hundred; Three fifths
（B）hundred; Three fifth
（C）hundreds; Three fifth
（D）hundreds; Three fifths
— Good news! Bill won （ ） medal in the long jump just now. — Really? That's his （ ） one at our sports meeting.
（A）a; four
（B）an; fourth
（C）a; fourth
（D）an; four
