大学英语 4PDF电子书下载

Lesson 1　Types of Insurance 1

Text 1

Language Points 20

Exercises 21

Key 29

Translation of the Text 32

Lesson 2　Foreign Language Study in America 34

Text 34

Language Points 44

Exercises 46

Key 53

Translation of the Text 56

Lesson 3　The International Reserve 58

Text 58

Language Points 69

Exercises 70

Key 78

Translation of the Text 81

Lesson 4　Abraham Lincoln 82

Text 82

Language Points 98

Exercises 99

Key 106

Translation of the Text 108

Lesson 5　How Harmful Smoking Can Be to Our Health 110

Text 110

Language Points 125

Exercises 126

Key 133

Translation of the Text 136

Lesson 6　What Are Futures Markets? 138

Text 138

Language Points 153

Exercises 154

Key 161

Translation of the Text 165

Lesson 7 "Ever Tried Talking to a Computer?" 166

Text 166

Language Points 183

Exercises 184

Key 191

Translation of the Text 194

Lesson 8 Underdevelopment and the Sciences 196

Text 196

Language Points 210

Exercises 211

Key 218

Translation of the Text 221

Lesson 9 Technological Change and Innovations 223

Text 223

Language Points 243

Exercises 244

Key 251

Translation of the Text 254

Lesson 10 Economic Ups and Downs 256

Text 256

Language Points 276

Exercises 278

Key 285

Translation of the Text 288