Unit 1 In class补充习题答案 Unit 2 In the library补充习题答案 Unit 3 Is this your pencil?补充习题答案 Unit 4 Where's the bird?补充习题答案 Revision 1  补充习题答案 Unit 5 How old are you?补充习题答案 Unit 6 What time is it?补充习题答案 Unit 7 On the farm补充习题答案 Unit 8 We're twins! 补充习题答案 Project 2 A magic clock 补充习题答案

Unit 1 In class补充习题答案 Unit 2 In the library补充习题答案 Unit 3 Is this your pencil?补充习题答案 Unit 4 Where's the bird?补充习题答案 Revision 1  补充习题答案 Unit 5 How old are you?补充习题答案 Unit 6 What time is it?补充习题答案 Unit 7 On the farm补充习题答案 Unit 8 We're twins! 补充习题答案 Project 2 A magic clock 补充习题答案