Unit 1 Colorful World Unit 2 Home and Family Unit 3 Animals and Mankind Unit 4 Volunteers(1) Unit 5 Volunteers(2) Unit 6 A wonderful day Unit 7 Hobby and Interest Unit 8 Outdoor Activity Unit 9 Sports Fans(1) Unit 10 Sports Fans(2) Unit 11 Music Fans Unit 12 Emails and Spam Unit 13 Blessing or Curse Unit 14 Global Warming Unit 15 Global Village(1) Unit 16 Global Village(2)
以下为对购买帮助不大的评价