Unit1 The summer holidays 1
Unit2 In the lab 24
Unit3 American English 44
Unit4 Travel 61
Unit5 Why do you do that? 78
Unit6 A new factory 98
Unit7 Earthquakes 115
Unit8 Mainly revision 136
Unit9 Computers 154
Unit10 Sports 171
Unit11 Country music 188
Unit12 English programmes 205
Unit13 Abraham Lincoln 226
Unit14 Mainly revision 248
Unit15 Healthy eating 268
Unit16 Fire! 287
Unit17 Nature 304
Unit18 The necklace 322
Unit19 Jobs 341
Unit20 Mainly revision 360
期中自测题 378
Unit21 Karl Marx 390
Unit22 Britain and lreland 408
Unit23 Rescuing the temple 427
Unit24 The science of farming 445
Unit25 At the conference 461
Unit26 Mainly revision 479
期末自测题 496
综合自测一 508
综合自测二 520