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