Unit 1 The summer holiday 1
Unit 2 In the lab 17
Unit 3 Amenican English 32
Unit 4 Travel 47
Unit 5 Why do you do that? 60
Unit 6 A new factory 76
Unit 7 Earthquakes 92
Unit 8 Mainly Revision 106
Unit 9 Computers 119
Unit 10 Sports 133
Unit 11 Country music 146
Unit 12 English programmes 160
Unit 13 Abraham Lincoln 170
Unit 14 Mainly Revision 183
Unit 15 Healthy eating 195
Unit 16 Fire! 208
Unit 17 Nature 222
Unit 18 The necklace 233
Unit 19 Jobs 249
Unit 20 Mainly Revision 266
Unit 21 Karl Marx 283
Unit 22 Britain and lreland 300
Unit 23 Rescuing the temple 316
Unit 24 The Science of farming 330
Unit 25 At the conference 344
Unit 26 Mainly Revision 357
参考答案 370