一、1---5 AACCB 6---10 BBCCA 11---15 BCABC

　　二、16---20 ABCDC 21---25 BBADB 26---30 CBACA

　　三、31---35 DBABC 36---40 BDACD

　　四、41---43 DCA 44---46 BCA 47---50 DBDB

　　五、51. education 52. smoking 53. touch 54. punished 55.successful 56. including 57. harmful 58. wisely

　　59. was polluted 60. living 61. operations 62. working

　　63. healthy 64. selling 65. to finish 66. hold

　　67. businesses 68. also 69. a lot of 70. take part in

　　71. too---to 72. to help 73. was given 74. be built 75. How long

　　六、76. smaller 77. danger 78. Reason 79. allowed 80. duty