三．单项选择（每小题1分，共15分）
( )16. What’s this _________ English?
A. an B. o n C. in
( )17. My pen is __________.
A. a red B. red C. Red
( )18. Are ______ her p arents?
A. this B. these C. she
( )19. ---Is Kate your friend? --- ______.
A. Yes, she is. B. No, he isn’t C. Yes, it is.
( )20. Thanks _______th e photo of your family.
A. at B .to C. for
