二、单项选择（本题共15小题；每小题1分, 满分15分）
( ) 21. _______ apple _____ day keeps _______ doctor away.
A. An; an; the B. The; a; the C. An; a ; the D. An; a; /
( ) 22. — your name Millie?
—_____________ .
A. Are; Yes, I am. B. Is; Yes, it is. C. Is; Yes, I am. D. Are; Yes, it is.
