Unit 1 The summer holidays 1
Unit 2 In the lab 17
Unit 3 American English 33
Unit 4 Travel 51
Unit 5 Why do you do that? 68
Unit 6 A new factory 84
Unit 7 Earthquakes 106
Unit 8 Mainly revision 124
Unit 9 Computers 139
Unit 10 Sports 155
Unit 11 Country music 172
Unit 12 English programmes 186
Unit 13 Abraham Lincoln 201
Unit 14 Mainly revision 221
Unit 15 Healthy eating 236
Unit 16 Fire! 254
Unit 17 Nature 273
Unit 18 The necklace 288
Unit 19 Jobs 304
Unit 20 Mainly revision 321
Unit 21 Karl Marx 339
Unit 22 Britain and Ireland 356
Unit 23 Rescuing the temple 374
Unit 24 The science of farming 391
Unit 25 At the conference 408
Unit 26 Mainly revision 424
参考答案 444