Concentrate on,at present,stay up,learn form,have an opportunity,be good for,the other day
1.swimming________your health
2._______teenagers have strong personalities.they need freedom and independence
3.You will solve the problem if you________more________it
4.Students should______each other
5.I will ask Jackie shan for his autograph if i________yo meet him
6.________,Lisa happened to meet her teacher on the way to London