39. A. until B. unless C. before D. since
38. A. Yes B. No C. A moment D. After you
37. A. spend B. waste C. save D. cost
36. A. walk B. swim C. meal D. picnic
35. A. straight forward B. afraid C. innocent D. authentic
34. A. still B. even C. ever D. never
33. A. can B. must C. need D. shall
32. A. saw B. noticed C. watched D. realized
31. A. who B. which C. they D. whom
30. A. washing B. clearing C. appreciating D. playing
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