Unit 5 Doctor and nurse He is a postman, a postman.He is tall, he is tall.Goodbye, postman, goodbye.He is a policeman, a policeman.He is tall, he is tall.Goodbye, policeman, goodbye.Sing a songSheShe is a girl.She is a teacher.She is a driver.Guangming HospitalShe is a doctor.She is old.How old is she?She is 50.She is a nurse.No, She is young.Is she old?Is she a doctor?Yes,she is.She is a doctor.Rhyme: Tall doctor, short doctor, I can see. Old doctor, young doctor, Come and ..