Unit 1 How tall are you? Unit 2 Last weekend Unit 3 Where did you go Unit 4 Then and now Recycle Mike's happy days Appendix 1:Songs in each unit Appendix 2:Words in each unit Appendix 3:Vocabulary Appendix 4:Useful expressions Appendix 5:Proverbs Appendix 6:Short plays Appendix 7:Irregular verbs Appendix 8:English pronunciation patterns