Unit 4 January is the first month Lesson 22 教学设计1

Unit 4 January is the first month Lesson 19 教学设计1

Unit 4 January is the first month Lesson 20 教学设计1

Unit 4 January is the first month Lesson 21 教学设计1

Unit 4 January is the first month Lesson 20 教学设计2

Unit 4 January is the first month Lesson 23 教学设计2

Unit 4 January is the first month. Lesson 22 习题 1