40    A. turn B. burn C. curtain D. bury
41   A. ships                B. fees                  C. cats                 D. clocks 
42   A. ordered            B. controlled       C. changed           D. watched
43 A. plain B. paint  C. repair D.main
44 A. soon B. mood  C.  blood/ flood   D.moon
45. A. tea          B. beat   C. great D. sea
46. A. energy               B. liter                  C. shower         D. serve
47. A. studied              B. interested         C. turned           D. installed
48. A. separate          B. select                 C. electronic      D. English
49. A. chemistry         B. reach                C. kitchen          D. exchange
50. A. flow                  B. row                   C. know           D. now
51    A. walks B. cups C. students D. pens
52  A. moment B. slogan C. comb D. opposite
53   A. produce B. huge  C. lunar D. cure
54   A. bomb B. debt C. describe D. doubt
55   A. teenage B. luggage C. image D. damage
56    A. lose B. move C. stove D. improve
57. A. invited          B. arrived          C. mentioned             D. loved
58. A. ancient          B. special           C. ocean                     D. celebrate
59. A. fuel              B. supper              C. refuse                    D. duty
50. A. pollute         B. university         C. reduce                  D. confuse
61. A. potatoes          B. goes                   C. tomatoes          D. diseases
62. A. used               B. designed             C. wanted            D. cried
63. A. plays             B. doors                  C. beds                D. students
64. A. easily             B. ready                  C. teacher             D. speaker
65. A. fly                 B. hobby                 C. energy              D. ordinary
66. A. dump             B. bluff                    C. nuclear            D. plumber
67. A. garbage         B. garage                 C. sewage            D. carriage
68. A. pagoda          B. category               C. suggest           D. regular
69 A. plumber         B. bath                     C. label                D. garbage
70. A. beach           B. clean                  C. instead              D. leave
71. A. played        B. filled                  C. died                    D. walked
72. A. watch          B. Christmas          C. chat                   D. exchange
73. A. equal            B. fashion           C. champagne            D. match
74. A. economy      B. occasion         C. freedom                 D. logical
75. A. invite           B. river                C. shrine                     D. primary
76. A. encourage    B. proud              C. enough                   D. young
77. A. cross                     B. conclude             C. carry                        D. celebrate
78. A. dripped                 B. conserved           C. received                    D. learne