1．KEY TO THE LISTENING EXERCISES 2
Lesson One:The Study of Sciences 2
Lesson Two:A Most Serious Decision To Make 8
Lesson Three:Do UFOS Cone From Outer Space? 13
Lesson Four:The Killer Bees 19
Lesson Five:How Many Colds Do You Have Each Year? 25
Lesson Six:Choosing A Career 30
Lesson Seven:New Year 37
Lesson Eight:Time and Culture 43
Lesson Nine:Help for The Dying and Their Friends 49
Lesson Ten:Challenges 55
Lesson Eleven:The Role of Women in Society 62
Lesson Twelve:A Versatile Man 69
Lesson Thirteen:John's Heart Speaks Out 76
Lesson Fourteen:The Moon,No Longer a Mystery 82
Lesson Fifteen:Space-Age Technology 89
Lesson Sixteen:First Steps in First Aid 97
Lesson Seventeen:What Will the Future Be 103
Lesson Eighteen:AIDS 111
Model Listening Test 119
2．KEY TO THE READING AND WRITING EXERCISES 129
AND TRANSLATION FOR TEXT 129
Key to Exercises 129
Unit 1 129
Unit 2 131
Unit 3 133
Unit 4 136
Unit 5 138
Unit 6 139
Unit 7 141
Unit 8 143
Unit 9 145
Unit 10 147
Translation 150
Unit 1 150
Unit 2 152
Unit 3 156
Unit 4 161
Unit 5 163
Unit 6 167
Unit 7 170
unit 8 174
Unit 9 177
Unit 10 180