40. A. challenging B. different C. dangerous D. strange
39. A. worthless B. thoughtless C. hopeless D. helpless
38. A. At B. During C. On D. With
37. A. must B. would C. might D. should
36. A. spirit B. intention C. idea D. attempt
35. A. believe B. protect C. treat D. receive
34. A. looked up B went up C. took up D. showed up
33. A. upset B. frightened C. guilty D. ashamed
32. A. patiently B. eagerly C. successfully D. skillfully
31. A. learning B. judging C. obeying D. imagining