Unit 1 Gift-giving Unit 2 Celebrations Unit 3 Roommates Unit 4 Housing Unit 5 At the Library Unit 6 Self-description Unit 7 Becoming a Confident Speaker Unit 8 Emotions Unit 9 Making Arrangements Unit 10 Satisfaction Unit 11 Argument Unit 12 Infectious Disease Unit 13 Oceans and Beaches Unit 14 Food Chain Unit 15 Car Rental Unit 16 Merit Unit 17 Accidents Unit 18 Natural Disasters Unit 19 Personal Experience Unit 20 Being Creative
以下为对购买帮助不大的评价