Unit 1 Space Exploration 1
Ⅰ.Teaching Content 1
Ⅱ.Key to Exercises 14
Ⅲ.Translation of the Texts 27
Unit 2 Energy 31
Ⅰ.Teaching Content 31
Ⅱ.Key to Exercises 43
Ⅲ.Translation of the Texts 53
Unit 3 Gender Differences 56
Ⅰ.Teaching Content 56
Ⅱ.Key to Exercises 65
Ⅲ.Translation of the Texts 79
Unit 4 Information Security 83
Ⅰ.Teaching Content 83
Ⅱ.Key to Exercises 91
Ⅲ.Translation of the Texts 100
Unit 5 Future Vehicles 104
Ⅰ.Teaching Content 104
Ⅱ.Key to Exercises 114
Ⅲ.Translation of the Texts 125
Unit 6 Skyscrapers 128
Ⅰ.Teaching Content 128
Ⅱ.Key to Exercises 134
Ⅲ.Translation of the Texts 144
Unit 7 Animal Behavior 147
Ⅰ.Teaching Content 147
Ⅱ.Key to Exercises 154
Ⅲ.Translation of the Texts 165
Unit 8 Natural Disasters 168
Ⅰ.Teaching Content 168
Ⅱ.Key to Exercises 182
Ⅲ.Translation of the Texts 193