1. There is a big football ________________(a place for people to play football) in my school.
Look, some boys are playing football there.
2. In China, the summer holiday usually ______ (结束) before September 1st.  
3. Do you often ________________(借) books from the library?
4. It is good for us to do morning ___________________(锻炼)every day.
5.Lucy thinks it is ________ (困难的)to learn English. But I don't think so.