—How far is it from your home to the school? —Half _______ hour’s walk.A. a B. an C. the
Mr. Zhou was really anxious _____he can’t find his car.
— What would you do if you won the lottery? — I would give it_____ medical research.
That notebook _____ John’s. It has his name on it.
Iplay the piano when I was a young boy.
Teenagers should not _____ .