听下面一段对话，回答16至18三个小题。
()16. What's the probable relationship between the two speakers?
A. Brother and sister.
B. Teacher and student.
C. Friends.
()17. What is Peter interested most about the museum?
A. The rockets.
B. The moon rock.
C. The robot models.
()18. Who will join them?
A. Peter's brother.
B. Emma's brother.
C. Their science teacher.

16.C 17.B 18.B

听下面一段对话，回答19至21三个小题。
()19. Why is Fu Xing designing a robot?
A. For a science fair.
B. For his homework.
C. For his future.
()20. How does the robot work?
A. By asking questions.
B. By watching feelings.
C. By talking to people.
()21. Who might the robot help most according to Fu Xing?
A. Disabled people.
B. Stressed students.
C. Robot lovers.

19.A 20.B 21.B