8. Many kites are flying ______the building.

7. There are two boats going ________the bridge.

6. Walk _______the table many times, you will feel uncomfortable.

5. Look! Your English teacher is walking______ the　 library.

4. Your parents are walking _________the stairs.

3. The bus travels _________Wuxi ______Nanjing.

2. Please go _____the road to the end.

1. The twins are climbing _________the trees.

16. does, write　　 17. fishing　　 18. giving　 19. healthy　 20. salty

11. to go　 12. knives　　 13. less　 14. salty　　 15. thin