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Unit One  Matching the Headings 1 Exercise 1  A Giant Step for Artificial Enzymes 6 Exercise 2  More Than Sympathy 8 Exercise 3  Energy from Biological Sources 11 Exercise 4  Sleeping Secrets 15 Exercise 5  It Never Rains 18 Exercise 6  Farmers Harvest the Wind 22 Exercise 7  Germs and Sickness in a Shrinking World 25 Exercise 8  On the Wing 28 Unit Two Cloze 32 Exercise 1  Standards of Measurement 35 Exercise 2  The Function of Carbon Dioxide in the Atmosphere 36 Exercise 3  The Properties of Systems in the Human Body 38 Exercise 4  Analysis and Synthesis 39 Exercise 5  The Properties of Elements, Compounds and Mixtures 41 Exercise 6  The Structure of the Earth 42 Exercise 7  The Carbon Cycle 43 Exercise 8  Vitamins 45 Exercise 9  Thermostats 46 Exercise 10  Pressure 48 Exercise 11  Space and Distance 49 Exercise 12  The Theory of Emotion 51 Exercise 13  Physical Characteristics 52 Exercise 14  Attitude Functions 53 Exercise 15  Functions of Leadership 55 Unit Three  Multiple Choice 57 Exercise 1  Are You a Machine of Many Parts? 63 Exercise 2  Making Allowances for Your Kids¡¯ Dollar Values 67 Exercise 3   The Lost City of DeMille Emerges from the Desert Sands of California 70 Exercise 4  Separate, but EQ 73 Unit Four  Summarizing 75 Exercise 1  Adapting to Road Conditions 79 Exercise 2  Biogas: a Solution to Many Problems 81 Exercise 3  A 19th Century Killer Disease: Tuberculosis 83 Exercise 4  For Each Astronaut, a ¡° Buddy¡± 85 Exercise 5  Management in Cyberspace 88 Exercise 6  Our Dying Seas 90 Exercise 7  Ethics and Archaeology 94 Unit Five  YES/NO/NOT GIVEN 97 Exercise 1  The World of the Flat-footed Fly 102 Exercise 2  Energy, Fission and Fusion 105 Exercise 3  Will Britain Turn Its Back on Wave Power? 109 Exercise 4  Talk to Kids about Drugs? Parents Just Don¡¯t Do It 112 Exercise 5  A New Learning Tool 116 Exercise 6  Ill Winds 119 Exercise 7  Stuffed 122 Exercise 8  Brain Drain 124 Exercise 9  Morphing Winglets Make for Greener Aircraft 129 Exercise 10 Transporter of Delight 132 Unit Six Scanning for Answers 136 Exercise 1  Batteries Now Included 140 Exercise 2  A Light Bulb that Lasts 143 Exercise 3  Elemental Clues to a Galaxy¡¯s Past 145 Exercise 4  Vital Role in World Airline Industry 148 Exercise 5  Tough Sensor Can Take the Heat 152 Exercise 6  Model Atmosphere Show Signs of Life 154 Exercise 7  Tree Rings Are Laying Bare the Climatic History of Asia 158 Unit Seven Integrated Exercises 160 Exercise 1  Museums Are Showing off the Stuff in the Attic 165 Exercise 2  A Sense of Crisis 168 Exercise 3  Carcinogenic Dye in Hundreds of Food Products 173 Exercise 4  Saving the Seahorses 176 Exercise 5  Deadly Illusion Brings Death on the Road 180 Exercise 6  How Safe Are Air Bags? 183 Exercise 7  Expanding Consciousness 186 Exercise 8  A Harebrained Scheme 189 Exercise 9  Hypnosis 193 Exercise 10  Metal Compounds Which Break the Rules 196 Unit Eight  Practice Tests 199 PRACTICE TEST (Version One) 201 PRACTICE TEST (Version Two) 213 PRACTICE TEST (Version Three) 225 PRACTICE TEST (Version Four) 237 PRACTICE TEST (Version Five) 250 PRACTICE TEST (Version Six) 262 PRACTICE TEST (Version Seven) 274 Answer Key 285 Appendices 1. A Brief Introduction to the IELTS Test 297 2. IELTS Reading Answer Sheet 301