UNIT 1 What Is a Scientific Theory? 1
UNIT 2 Interview Preparation 7
UNIT 3 Teen Drug Abuse:Bring the Message Home 12
UNIT 4 New“Gree Revolution”：Cleaner Cars and Energy 18
UNIT 5 Computer Virus 24
UNIT 6 How to Argue with Your Boss 30
UNIT 7 Winners,Losers of Just Kids 35
UNIT 8 Ways to Get Ahead in Tough Times 42
UNIT 9 The Digital Divide 49
UNIT 10 The Secret Hacker Wars 55
UNIT 11 Pollution Is a Dirty Word 60
UNIT 12 Nabbing the Pirates of Cyberspace 66
UNIT 13 The“Flickering Blue Parent”：Children and Television 73
REVISION Exercises 1 78
UNIT 14 Brain Drain? 88
UNIT 15 Will We Meet E.T.? 95
UNIT 16 Why Smart People Do Dumb Things？ 102
UNIT 17 How Lucky People Get That Way 109
UNIT 18 The Shadows 116
UNIT 19 On-line and in Fashion 122
UNIT 20 How the Rich Got Rich 129
UNIT 21 Opportunity Knocks-but at a Cost 136
UNIT 22 Is There Anybody out There? 141
UNIT 23 East vs.West 148
UNIT 24 Will We Still Eat Meat? 154
UNIT 25 The Oceans-Man s Last Great Resource 160
REVISION Exercises 2 166
KEY 176