2.聽第五段材料,回答第18至20小題. 18.Who is Jim? A.Kate's brother. B.Kate's uncle. C.Kate's father. 19.What does Kate want the robot to do? A.Help her to do homework. B.Play with her. C.Help her parents to do housework. 20.How long will it take Kate to make a robot? A.Two or three days. B.Two or three months. C.Two or three years.