描述
欢迎使用
目录
Unit 1 Hello! (免费使用)
Unit 2 What's this?
Unit 3 Can you sing?
Unit 4 Review 1
Unit 5 Who's she?
Unit 6 What's his name?
期中测试
Unit 7 Is this a dog?
Unit 8 Review 2
Unit 9 What color is this?
Unit 10 How old are you?
Unit 11 What do you like?
Unit 12 Review 1
期末测试（一）
期末测试（二）