一、单句语法填空
1. (play) basketball is very popular with boys in our school.
答案Playing
2. (play) basketball is what I want to do this afternoon.
答案To play
3. (walk) is a good form of exercise for both men and women.
答案Walking
4.It is no use (think) about the past or being worried about the future.
答案thinking
5.It’s a waste of time (quarrel) about it.We are all in the same boat.
答案quarrelling
