( )16. How many floors are mentioned in the text?
A. Two.
B. Three.
C. Four.
( )17. What can the students see on the third floor?
A. The inventions in the old days.
B. The inventions in the 20th century.
C. Some inventors' pictures and their life introduction.
( )18. When will they meet?
A. At 3:15.
B. At 3:45.
C. At 3:50.
( )19. How can students get more information about the museum?
A. By going online.
B. By borrowing books.
C. By asking their parents.
( )20. What might be the speaker?
A. A museum guide.
B. A student.
C. A teacher.

16-20 CBAAC

(1)
(2)

(1) My robot went wrong.