29. A. start B. help C. stop D. quit
28. A. imagine B. think C. expect D. doubt
27. A. I failed. B. Not me. C. Can I? D. I can’t.
26. A. settle B. bend C. change D. fix
25. A. beat B. knock C. strike D. defend
24. A. curious B. good-looking C. serious D. funny
23. A. When B. As C. While D. Since
22. A. quiz B. question C. problem D. mystery
21. A. if B. except C. until D. unless
20. A. let B. challenge C. admit D. get