19.As a running star,he is (　　 )his school running team.

18.I disagree (　　　 )his ideas,but he agree (　　 )him.

17.Some students should be allowed to have Friday afternoons (　　 )to volunteer and help others.

15.I can’t choose which pair of jeans (　　 )( buy).They both look good (　　 )me.

14.(　　 )groups, we can learn a lot (　　　 )each other.

13.Her father is very strict (　　 )his clothing.

12.Parents should not be too strict (　　 ) teenagers.

11.I’m allowed to go to the movies (　　 )friends at night, but I have to be home (　　　 ) 10pm.

10.I have to stay at home (　　 )school nights.

9.He worked out the math problem (　　 )that way.