Unit 1 Text:Tornadoes 1
Words and Expressions 2
Notes 2
Grammar:Auxiliary Verbs and Model Verbs Ⅰ 2
Exercises 4
Grammar Exercises 4
Unit 2 Text:Quasars 5
Words and Expressions 6
Notes 6
Grammar:Auxiliary Verbs and Model Verbs Ⅱ 7
Exercises 8
Grammar Exercises 8
Unit 3 Text:The School That I'd like 10
Words and Expressions 11
Notes 11
Grammar:Auxiliary Verbs and Model Verbs Ⅲ 11
Exercises 13
Grammar Exercises 14
Unit 4 Text:Travel 15
Words and Expressions 15
Notes 16
Grammar:Auxiliary Verbs and Model Verbs Ⅳ 16
Exercises 18
Grammar Exercises 19
Unit 5 Text:New Uses for Fly Ash 20
Words and Expressions 20
Notes 21
Grammar:Auxiliary Verbs and Model Verbs Ⅴ 21
Exercises 22
Grammar Exercises 23
Unit 6 Text:Women's Work? 25
Words and Expressions 26
Notes 26
Grammar:Auxiliary Verbs and Model Verbs Ⅵ 26
Exercises 27
Grammar Exercises 28
Unit 7 Text:Wind Power 29
Words and Expressions 29
Notes 30
Grammar:Adjectives Ⅰ 30
Exercises 31
Grammar Exercises 32
Unit 8 Text:Electricity:The Force That Tranformed the World 33
Words and Expressions 34
Notes 34
Grammar:Adjectives Ⅱ 34
Exercises 36
Grammar Exercises 36
Unit 9 Text:Meteorites 37
Words and Expressions 38
Notes 38
Grammar:Adverbs Ⅰ 39
Exercises 40
Grammar Exercises 40
Unit 10 Text:The Consuming Passion 41
Words and Expressions 41
Notes 42
Grammar:Adverbs Ⅱ 42
Exercises 43
Grammar Exercises 44
Unit 11 Text:Electromedicine 45
Words and Expressions 46
Notes 46
Grammar:Adverbs Ⅲ 46
Exercises 48
Grammar Exercises 48
Unit 12 Text:Coping with Stress 50
Words and Expressions 51
Notes 51
Grammar:Adverbs Ⅳ 51
Exercises 52
Grammar Exercises 53
Unit 13 Text:Job Availability Cited 54
Words and Expressions 55
Notes 55
Grammar:Prepositions Ⅰ 55
Exercises 56
Grammar Exercises 57
Unit 14 Text:U.S.cities:Past and Present 58
Words and Expressions 59
Notes 59
Grammar:Prepositions Ⅱ 60
Exercises 61
Grammar Exercises 61
Unit 15 Text:The Story of Salt 63
Words and Expressions 64
Notes 64
Grammar:Prepositions Ⅲ 65
Exercises 66
Grammar Exercises 67
Unit 16 Text:What Happens During Exercise? 68
Words and Expressions 69
Notes 69
Grammar:Prepositions Ⅳ 70
Exercises 71
Grammar Exercises 72
Unit 17 Text:Water Highways 73
Words and Expressions 74
Notes 74
Grammar:Prepositions Ⅴ 75
Exercises 76
Grammar Exercises 78
Unit 18 Text:Supermarkets:A Plan with a Purpose 79
Words and Expressions 80
Notes 81
Grammar:Prepositions Ⅵ 81
Exercises 82
Grammar Exercises 83
Unit 19 Text:Handedness Begins at Birth 84
Words and Expressions 85
Notes 85
Grammar:Prepositions Ⅶ 85
Exercises 86
Grammar Exercises 87
Unit 20 Text:Your Teeth 88
Words and Expressions 89
Notes 90
Grammar:Prepositions Ⅷ 90
Exercises 91
Grammar Exercises 92
Unit 21 Text:Animal Education 93
Words and Expressions 94
Notes 94
Grammar:Prepositions Ⅸ 95
Exercises 96
Grammar Exercises 97
Unit 22 Text:The Most Powerful Computer in the Universe 98
Words and Expressions 99
Notes 99
Grammar:Prepositions Ⅹ 99
Exercises 100
Grammar Exercises 102
Unit 23 Text:Is the Sun in Motion 103
Words and Expressions 103
Notes 104
Grammar:Prepositions Ⅺ 105
Exercises 105
Grammar Exercises 106
Unit 24 Text:Work,Labor,and play 107
Words and Expressions 108
Notes 108
Grammar:Conjunctions Ⅰ 109
Exercises 110
Grammar Exercises 112
Unit 25 Text:Heat Treatment of Steel 113
Words and Expressions 113
Notes 114
Grammar:Conjunctions Ⅱ 115
Exercises 116
Grammar Exercises 117
Unit 26 Text:Container 118
Words and Expressions 119
Notes 120
Grammar:Conjunctions Ⅲ 120
Exercises 121
Grammar Exercises 123
Unit 27 Text:The World's First Completely Automatic Railway 124
Words and Expressions 125
Notes 125
Exercises 126
Grammar Exercises 127
Unit 28 Text:Common Cold 129
Words and Expressions 130
Notes 131
Grammar:Interjection 131
Exercises 132
Grammar Exercises 133
Unit 29 Text:The Control of Population 134
Words and Expressions 135
Notes 136
Grammar:Sentence and Members of Sentence 136
Exercises 137
Grammar Exercises 139
Unit 30 Text:The Sea 140
Words and Expressions 140
Notes 141
Grammar:Simple Sentences and Compound Sentences 142
Exercises 142
Grammar Exercises 144
Unit 31 Text:How is Crude Oil Changed into Useful Products 145
Words and Expressions 145
Notes 146
Grammar:Complex Sentences 147
Exercises 148
Grammar Exercises 149
Unit 32 Text:Professions 150
Words and Expressions 150
Notes 152
Grammar:Declarative Sentences 152
Exercises 153
Grammar Exercises 154
Unit 33 Text:Education in the U.S 155
Words and Expressions 156
Notes 157
Grammar:Interrogative Sentences Ⅰ 157
Exercises 159
Grammar Exercises 160
Unit 34 Text:Agriculture in the U.S 161
Words and Expressions 161
Notes 163
Grammar:Interrogative Sentences Ⅱ 164
Exercises 165
Grammar Exercises 166
Unit 35 Text:New Insct-Resistant Corn 167
Words and Expressions 167
Notes 168
Grammar:Imperative Sentences and Exclamatory sentences 169
Exercises 170
Grammar Exercises 171
Unit 36 Text:Cells 172
Words and Expressions 173
Notes 173
Grammar:Subject Ⅰ 174
Exercises 175
Grammar Exercises 176
Unit 37 Text:The Story of Eyes 177
Words and Expressions 178
Notes 179
Grammar:Subject Ⅱ 179
Exercises 180
Grammar Exercises 181
Unit 38 Text:The First Men to Fly 182
Words and Expressions 183
Notes 183
Grammar:Subject Clause 184
Exercises 185
Grammar Exercises 186
Unit 39 Text:The First Men on Venus 187
Words and Expressions 187
Notes 188
Grammar:Predicate 189
Exercises 190
Grammar Exercises 191
Unit 40 Text:Good and Bad Monsters 192
Words and Expressions 193
Notes 194
Grammar:Subject-verb Concord 194
Exercises 195
Grammar Exercises 196
Unit 41 Text:1066 and All That 198
Words and Expressions 199
Notes 200
Exercises 200
Unit 42 Text:Medical Progress 202
Words and Expressions 203
Notes 203
Grammar:The Object Ⅰ 204
Exercises 205
Grammar Exercises 205
Unit 43 Text:Telephone,Television to Become One 207
Words and Expressions 208
Notes 209
Grammar:The Object Ⅱ 210
Exercises 211
Grammar Exercises 211
Unit 44 Text:Travel in the USA 212
Words and Expressions 213
Notes 214
Grammar:The Object Ⅲ 214
Exercises 215
Grammar Exercises 215
Unit 45 Text:Weather 217
Words and Expressions 217
Notes 219
Grammar:The Object Ⅳ 219
Exercises 220
Grammar Exercises 221
Unit 46 Text:A Carrot a Day May keep Cancer Away 222
Words and Expressions 223
Notes 224
Grammar:The Object Ⅴ 224
Exercises 226
Grammar Exercises 227
Unit 47 Text:Magnetism and Life 228
Words and Expressions 229
Notes 230
Grammar:The Attribute Ⅰ 230
Exercises 231
Grammar Exercises 232
Unit 48 Text:When Mountains Move 233
Words and Expressions 234
Notes 235
Grammar:The Attribute Ⅱ 235
Exercises 236
Grammar Exercises 237
Unit 49 Text:The Standard of Living 238
Words and Expressions 239
Notes 240
Grammar:The Attribute Ⅲ 240
Exercises 241
Grammar Exercises 241
Unit 50 Text:Nowhere to Call Home 243
Words and Expressions 244
Notes 245
Grammar:The Attribute Ⅳ 245
Exercises 246
Grammar Exercises 247
Unit 51 Text:Greenwich Mean Time 248
Words and Expressions 249
Notes 250
Grammar:The Attribute Ⅴ 250
Exercises 251
Grammar Exercises 252
Unit 52 Text:Fifth-Generation Computer 253
Words and Expressions 254
Notes 254
Grammar:The Adverbial Ⅰ 255
Exercises 256
Grammar Exercises 256
Unit 53 Text:Debates over New kind of Medical Technology 257
Words and Expressions 258
Notes 259
Grammar:The Adverbial Ⅱ 260
Exercises 260
Grammar Exercises 260
Unit 54 Text:An Overall Look at America 262
Words and Expressions 262
Notes 263
Grammar:The Adverbial Ⅲ 264
Exercises 264
Grammar Exercises 265
Unit 55 Text:George Taylor's Dairy 266
Words and Expressions 267
Notes 268
Grammar:The Adverbial Ⅳ 268
Exercises 269
Grammar Exercises 269
Unit 56 Text:Money and Banking 270
Words and Expressions 271
Notes 271
Grammar:The Adverbial Ⅴ 272
Exercises 272
Grammar Exercises 273
Unit 57 Text:Taxes in the United States 274
Words and Expressions 275
Notes 275
Grammar:The Adverbial Ⅵ 275
Exercises 276
Grammar Exercises 277
Unit 58 Text:The Role of Chance in Scientific Discovery 278
Words and Expressions 279
Notes 280
Grammar:The Adverbial Ⅶ 280
Exercises 281
Grammar Exercises 281
Unit 59 Text:Science and International Co-operation 283
Words and Expressions 284
Notes 284
Grammar:The Adverbial Ⅷ 285
Exercises 286
Grammar Exercises 286
Unit 60 Text:Pure and Applied Science 287
Words and Expressions 288
Notes 288
Grammar:The Independent Element 289
Exercises 290
Grammar Exercises 290
Unit 61 Text:Oil 291
Words and Expressions 291
Notes 292
Grammar:Word Order Ⅰ 292
Exercises 293
Grammar Exercises 294
Unit 62 Text:Us President's Styles of Work 295
Words and Expressions 296
Notes 297
Grammar:Word Order Ⅱ 298
Exercises 299
Grammar Exercises 299
Unit 63 Text:Mathematics and Military Technolohy 300
Words and Expressions 301
Notes 302
Grammar:Word Order Ⅲ 302
Exercises 303
Grammar Exercises 303
Unit 64 Text:Lincoln Attacks Slavery 304
Words and Expressions 305
Notes 306
Grammar:Word Order Ⅳ 306
Exercises 307
Grammar Exercises 308
Unit 65 Text:The Rocky Mountains 309
Words and Expressions 310
Notes 310
Grammar:Word Order Ⅴ 311
Exercises 312
Grammar Exercises 312
Unit 66 Text:The Other Road 313
Words and Expressions 314
Notes 314
Grammar:Ellipsis Ⅰ 315
Exercises 316
Grammar Exercises 316
Unit 67 Text:Secret Eye Scans Motorway 317
Words and Expressions 318
Notes 318
Grammar:Ellipsis Ⅱ 319
Exercises 319
Grammar Exercises 320
Unit 68 Text:Cool Laser Cuts Cleaner 321
Words and Expressions 321
Notes 322
Grammar:Ellipsis Ⅲ 323
Exercises 323
Grammar Exercises 324
Unit 69 Text:Hair-thin Coaxial Cable 325
Words and Expressions 325
Notes 326
Grammar:Ellipsis Ⅳ 326
Exercises 327
Grammar Exercises 327
Unit 70 Text:Lamb Chop 328
Words and Expressions 329
Notes 330
Grammar:Transformation of Sentences Ⅰ 330
Exercises 331
Grammar Exercises 331
Unit 71 Text:Hubble Out of Trouble 333
Words and Expressions 333
Notes 334
Grammar:Transformation of Sentences Ⅱ 335
Exercises 336
Grammar Exercises 336
Unit 72 Text:Chemical Hormone Offers Hope to Conquer Obesity Diabetes 338
Words and Expressions 338
Notes 339
Grammar:Ⅰ．Transformation of Sentences Ⅲ 340
Ⅱ．Analysis of Sentences Ⅰ 340
Exercises 341
Grammar Exercises 341
Unit 73 Text:Automated Pipeline Replacement System 343
Words and Expressions 344
Notes 345
Grammar:Analysis of Sentences Ⅱ 346
Exercises 347
Grammar Exercises 348
Unit 74 Text:Oranges Oil Shows Promise as Insecticide 349
Words and Expressions 349
Notes 350
Grammar:Punctuation Ⅰ 351
Exercises 352
Grammar Exercises 352
Unit 75 Text:GE's Superconducting Generator 353
Words and Expressions 353
Notes 354
Grammar:Punctuation Ⅱ 354
Exercises 356
Grammar Exercises 356