Unit One Matching the Headings 1
Exercise 1．A Giant Step for Artificial Enzymes 6
Exercise 2．Population Growth and Food Supply 8
Exercise 3．More Than Sympathy 11
Exercise 4．Energy from Biological Sources 14
Exercise 5．Sleeping Secrets 18
Exercise 6．It Never Rains 21
Exercise 7．Farmers Harvest the Wind 24
Exercise 8．Germs and Sickness in a Shrinking World 27
Exercise 9．On the Wing 30
Unit Two Cloze 35
Exercise 1．Standards of Measurement 38
Exercise 2．The Function of Carbon Dioxide in the Atmosphere 39
Exercise 3．The Properties of Systems in the Human Body 40
Exercise 4．Analysis and Synthesis 42
Exercise 5．The Properties of Elements,Compounds and Mixtures 43
Exercise 6．The Structure of the Earth 44
Exercise 7．The Carbon Cycle 45
Exercise 8．Vitamins 47
Exercise 9．Thermostats 48
Exercise 10．Pressure 50
Exercise 11．Importance of Nonverbal Communication 51
Exercise 12．Space and Distance 52
Exercise 13．Humour 54
Exercise 14．The Theory of Emotion 55
Exercise 15．Physical Characteristics 56
Exercise 16．Attitude Functions 58
Exercise 17．Contemporary Forms of Discussion 59
Exercise 18．Functions of Leadership 61
Unit Three Multiple Choice 63
Exercise 1．Are You a Machine of Many Parts? 69
Exercise 2．Making Allowances for Your Kids'Dollar Values 72
Exercise 3．The Lost City of DeMille Emerges from the Desert Sands of California 76
Exercise 4．Separate,But EQ 79
Unit Four Summarizing 81
Exercise 1．Adapting to Road Conditions 86
Exercise 2．Who's Crazy? 88
Who Says Who Is Mad? 91
Exercise 3．Biogas:a Solution to Many Problems 93
Exercise 4．A 19th Century Killer Disease:Tuberculosis 95
Exercise 5．For Each Astronaut,a"Buddy" 97
Exercise 6．Management in Cyberspace 100
Exercise 7．Our Dying Seas 102
Exercise 8．Ethics and Archaeology 106
Unit Five YES/NO/NOT GIVEN 109
Exercise 1．The World of the Flat-footed Fly 114
Exercise 2．Energy,Fission and Fusion 117
Exercise 3．Will Britain Turn Its Back on Wave Power? 120
Exercise 4．Talk to Kids about Drugs?Parents Just Don't Do It 124
Exercise 5．A New Learning Tool 127
Exercise 6．Ill Winds 131
Exercise 7．Stuffed 133
Exercise 8．Brain Drain 136
Unit Six Scanning for Answers 141
Exercise 1．Will Antarctic Ozone Bite the Dust? 145
Exercise 2．A Light Bulb that Lasts 147
Exercise 3．Elemental Clues to a Galaxy's Past 149
Exercise 4．Vital Role in World Airline Industry 153
Exercise 5．Tough Sensor Can Take the Heat 157
Exercise 6．Model Atmosphere Show Signs of Life 159
Unit Seven Integrated Exercises 163
Exercise 1．Earthquakes 168
Exercise 2．The Life Cycle of a City 170
Exercise 3．A Sense of Crisis 175
Exercise 4．Carcinogenic Dye in Hundreds of Food Products 179
Exercise 5．Saving the Seahorses 182
Exercise 6．Deadly Illusion Brings Death on the Road 186
Exercise 7．How Safe Are Air Bags? 189
Exercise 8．Expanding Consciousness 192
Exercise 9．A Harebrained Scheme 195
Exercise 10．Hypnosis 199
Exercise 11．Technique of Difficult Intramedullary Nail Removal Utilizing the Midas Rex 202
Exercise 12．Metal Compounds Which Break the Rules 206
Unit Eight Practice Tests 209
Practice Test(Version One) 211
Practice Test(Version Two) 223
Practice Test(Version Three) 234
Practice Test(Version Four) 245
Practice Test(Version Five) 257
Practice Test(Version Six) 268
Answer Key 279
Appendices 291
1．A Brief Introduction to the IELTS Test 291
2．IELTS Reading Answer Sheet 296