Unit 1 The summer holidays 2 In the lab 3 American English 4 Travel 5 Why do you do that? 6 A new factory 7 Earthquakes 8 Mainly revision 9 Computers 10 Sports 11 Country music 12 English programmes 13 Abraham Lincoln 14 Mainly revision 几种应用文体的介绍 · · · · · · (收起)