37. D. were collapsed
38. C. enhance
39. D. up
40. A. Let's buy some canned food
41. C. Pesticides
42. A. from
43. B. because
44. C. check
45. A. made
46. D. New Year's Eve
47. D. are installed
48. B. occurs
49. D. I wish I could, but I have no time
50. B. It's nice of you to say so
51. B. on
52. B. mechanic
53. C. in
54. C. will
55. B. Good idea
56. B. up
57. A. who
58. D. thank you
59. D. so
60. A. cyclone
61. D. protect
62. B. does she
63. C. inedible
64. B. which
65. A. on
66. B. would
67. A. in spite of
68. A. when
69. C. homeless
70. D. Great! Let's do that!