11. Viet Nam has four main _______ in a year.
A. seasons
B. months
C. weeks
D. summers
12. What about _______ to Hue on Sunday?
A. to go
B. go
C. goes
D. going
13. Today is Tuesday, so the day after tomorrow is _______.
A. Monday
B. Wednesday
C. Thursday
D. Friday
14. _______ many good students, Lan is the best one.
A. Between
B. Among
C. In
D. Of
15. My mother always wants me _______ the piano well.
A. to play
B. playing
C. play
D. to playing