Unit 1 The summer holidays
Unit 2 In the lab
Unit 3 American English
Unit 4 Travel
Unit 5 Why do you do that?
Unit 6 A new factory
Unit 7 Earthquakes
Unit 8 Mainly Revisi
N_Unit 9 Computers
Unit 10 Sports
Unit 11 Country music
Unit 12 English programmes
Unit 13 Abraham Linco
N_Unit 14 Mainly revisi
N_参考答案与提示