Unit4 I have a ball,Lesson 20,Lets sing,Review,Look and say,Review,I have,Presentation,Just learn,balloon,Presentation,How big,Presentation,Just learn,kite,Presentation,Cool,Practice,Game 1,大小声,ball,doll,balloon,kite,Practice,Game 2,Whats missing,Presentation,Look and say,Guess! What are they talking about,Presentation,Listen and imitate,Wow! How big! Look! I have a kite,Hi, Peter. I have a balloon,Cool,Show time,Good,Great,Excellent,两人一组，练习对话并表演，其他同学评价,Practice,Look and guess,看图并猜一猜他们会说些什么呢,Pra
