大学英语 下PDF电子书下载

VOLUME THREE 1

UNIT ONE 2

Text： Difficulties in Noise Control 3

Language Points ＆ Background Information 4

Exercises about the Text 8

Enjoy English 10

Grammar： Numeral Cardinal Numbers 12

Writing Skill： Types of Paragraphs （1） 13

UNIT TWO 15

Text： Animals of the Desert 16

Language Points ＆ Background Information 17

Exercises about the Text 23

Enj oy English 25

Grammar： Numeral— Ordinal Numbers 27

Writing Skill： Types of Paragraphs （2） 28

UNIT THREE 30

Text： Marriage and Divorce 31

Language Points ＆ Background Information 32

Exercises about the Text 37

Enjoy English 38

Grammar： Fractions and Decimals 40

Writing Skill： Paragraph Development— Process 41

UNIT FOUR 42

Text： Weather and Climate 43

Language Points ＆ Background Information 44

Exercises about the Text 49

Enjoy English 51

Grammar： Expressions of the Year， the Month， the Date and the Time 54

Writing Skill： Paragraph Development— Definition 55

UNIT FIVE 56

Text： Color 57

Language Points ＆ Background Information 58

Exercises about the Text 62

Enjoy English 64

Grammar： Nouns 67

Writing Skill： Paragraph Development— Classification and Analysis 68

UNIT SIX 70

Text： Online Education 71

Language Points ＆ Background Information 72

Exercises about the Text 78

Enjoy English 80

Grammar： Nouns and Numbers 83

Writing Skill： Paragraph Development— Comparison and Contrast 86

UNIT SEVEN 88

Text： Why Are We Fat？ 89

Language Points ＆ Background Information 90

Exercises about the Text 94

Enjoy English 96

Grammar： Nouns and Case 99

Writing Skill： Paragraph Development— Cause and Effect 100

UNIT EIGHT 101

Text： Teens and Tobacco 102

Language Points ＆ Background Information 103

Exercises about the Text 108

Enjoy English 109

Grammar： Nouns and Gender ＆ Grammatical Functions of the Noun 110

Writing Skill： Paragraph Development Persuasion and Argumentation 112

UNIT NINE 113

Text： Cheating on Campus 114

Language Points ＆ Background Information 115

Exercises about the Text 121

Enjoy English 122

Grammar： Articles 125

Writing Skill： Methods of Paragraph Development 126

UNIT TEN 128

Text： Go Fly A Kite 129

Language Points ＆ Background Information 131

Exercises about the Text 137

Enjoy English 138

Grammar： Articles before the Proper Noun 140

Writing Skill： Review of Writing Skills 143

VOLUME FOUR 144

UNIT ONE 145

Text： The Birth of Blue Jeans 146

Language Points ＆ Background Information 147

Exercises about the Text 151

Enjoy English 153

Grammar： The Performance of “than” 154

Writing Skill： Writing Effective Business Letters （1） 156

UNIT TWO 157

Text： Advertising： The Selling of A Product 158

Language Points ＆ Background Information 160

Exercises about the Text 165

Enjoy English 167

Grammar： Pronouns 170

Writing Skill： Writing Effective Business Letters （2） 171

UNIT THREE 173

Text： Fuzzy Logic Smarter Machines 174

Language Points ＆ Background Information 176

Exercises about the Text 182

Enjoy English 183

Grammar： Personal Pronouns ＆ Possessive Pronouns 186

Writing Skill： Writing Application Letters 189

UNIT FOUR 191

Text： Economic Effects of Terrorist Attacks 192

Language Points ＆ Background Information 193

Exercises about the Text 198

Enjoy English 199

Grammar： Self Pronouns ＆ Reciprocal Pronouns 202

Writing Skill： Writing an Effective Resume 203

UNIT FIVE 205

Text： Newspapers 206

Language Points ＆ Background Information 208

Exercises about the Text 212

Enjoy English 214

Grammar： Demonstrative Pronouns ＆ the Performance of “in” 216

Writing Skill： Research Paper Writing （1） 220

UNIT SIX 221

Text： Driver Education 222

Language Points ＆ Background Information 224

Exercises about the Text 230

Enjoy English 231

Grammar： Interrogative Pronouns ＆ Relative Pronouns 234

Writing Skill： Research Paper Writing （2） 235

UNIT SEVEN 236

Text： Hobbies 237

Language Points ＆ Background Information 238

Exercises about the Text 243

Enjoy English 245

Grammar： 1. Indefinite Pronouns 2. The Use of Indefinite Pronouns （1） 247

Writing Skill： Research Paper Writing （3） 250

UNIT EIGHT 252

Text： A Television Production 253

Language Points ＆ Background Information 255

Exercises about the Text 259

Enjoy English 260

Grammar： The Use of Indefinite Pronouns （2） 264

Writing Skill： Research Paper Writing （4） 265

UNIT NINE 266

Text： Soccer Becomes Part of European Culture 267

Language Points ＆ Background Information 269

Exercises about the Text 273

Enjoy English 275

Grammar： The Use of Indefinite Pronouns （3） 277

Writing Skill： Research Paper Writing （5） 279

UNIT TEN 280

Text： How to Deal with Winning the Lottery 281

Language Points ＆ Background Information 282

Exercises about the Text 287

Enjoy English 290

Grammar： The Agreement Between the Subject and the Predicate 292

Writing Skill： Research Paper Writing （6）—Final draft 295

APPENDIX Ⅰ - Answers to the Exercises of Volume Three 296

UNIT 1 296

UNIT 2 298

UNIT 3 300

UNIT 4 302

UNIT 5 304

UNIT 6 306

UNIT 7 308

UNIT 8 310

UNIT 9 312

UNIT 10 314

APPENDIX Ⅱ -Answers to the Exercises of Volume Four 316

UNIT 1 316

UNIT 2 318

UNIT 3 320

UNIT 4 322

UNIT 5 324

UNIT 6 326

UNIT 7 328

UNIT 8 330

UNIT 9 332

UNIT 10 334

APPENDIX Ⅲ Simulated Tests 336

Simulated Tests 336

Answers to the Simulated Tests 353