9．I think there will be ____________ (little)pollution and more trees in the future．

8．The thief wanted __________ (run)away，but he failed．

7．While they were fighting，someone ___________ (call)the police．

6．She ___________ (write)a letter to his parents at seven yesterday evening．

5．He didn’t hand in his homework u __________ he finished it．

4．What a pity! He f __________ the math exam again．

3．He won’t go skating tomorrow．I won't, ___________．

2．You should r __________ these library books to the library on time．

1．一What’s w__________ with him?　　 一He has a headache．

6. ___________　 7. ___________　 8. ___________　 9. ___________　 10. ___________