一. 单项填空（共20小题，每小题1分，满分20分）
( )1. My sports shoes are too old. My mother will buy a new ______ for me this Sunday.
A. pair B. one C. ones D. them
( )2. ________ of the students in our class are 14 years old this year.
A. Two threes B. Second thirds C. Second three D. Two thirds
