Unit1 The summer holidays 1
Unit2 In the lab 11
Unit3 American English 24
Unit4 Travel 35
Unit5 Why do you do that? 45
Unit6 A new factory 55
Unit7 Earthquakes 66
Unit8 Mainly revision 78
Unit9 Computers 86
Unit10 Sports 98
Unit11 Country music 107
Unit12 English programmes 119
Unit13 Abraham Lincoin 129
Unit14 Mainly revision 142
Unit15 Healthy eating 153
Unit16 Fire! 165
Unit17 Nature 176
Unit18 The necklace 187
Unit19 Jobs 200
Unit20 Mainly revision 210
Unit21 Karl Marx 219
Unit22 Britain and Ireland 234
Unit23 Rescuing the temple 247
Unit24 The science of farming 259
Unit25 At the conference 269
Unit26 Mainly revision 280
参考答案 292