Unit 1 The summer holiday 1
Unit 2 In the lab 19
Unit 3 American English 41
Unit 4 Travel 61
Unit 5 Why do…you do that？ 76
Unit 6 A new factory 95
Unit 7 Earthquakes 112
Unit 8 Mainly revision 133
Unit 9 Computers 152
Unit 10 Sports 172
Unit 11 Country music 186
Unit 12 English programmes 201
Unit 13 Abraham Lincoln 217
Unit 14 Mainly revision 235
Unit 15 Healthy eating 256
Unit 16 Fire！ 276
Unit 17 Nature 295
Unit 18 The necklace 313
Unit 19 Jobs 336
Unit 20 Mainly revision 356
Unit 21 Karl Marx 372
Unit 22 Britain and Ireland 394
Unit 23 Rescuing the temple 413
Unit 24 The science of farming 431
Unit 25 At the conference 450
Unit 26 Mainly revision 471
目标验收练习答案 492