Test A 1
Unit 1 Past and present 1
Test B 7
Unit 2 Travelling 13
Test A 13
Test B 19
Unit 3 Online travel 25
Test A 25
Test B 31
Midterm examination 37
Test A 37
Test B 45
Test A 53
Unit 4 A charity show 53
Test B 59
Unit 5 International charities 65
Test A 65
Test B 71
Unit 6 A charity walk 79
Test A 79
Test B 87
Final.examination 93
Test A 93
Test B 101
Answer key 109