26. His boss________ his plan, so he had to work it out again.

25. He was punished because he was caught ________ the book in the exam.

24. Further measures will be taken to ______ our streets ______ the mice.

23. 　She is good at________. What are you good at ?

22. __________ a cell phone on a motorcycle is dangerous. What else is dangerous?

21. 　_____ your homework is a good idea. What else helps your studies?

20. 　I enjoy_______ the violin in my free time. What do you like to do?

19. 　_______English is hard for me. What is hard for you?

18. 　I am used to_________ up late. How about you?

17. 　I hate_______ bills. What do you hate doing ?