21. We have_______ art room and_______ music room on the ground floor.
    A. an; an            B. a; an              C. an, a              D. a; a
22.…_______ you_______ Beijing?    …No, I'm not.
    A. Do; from               B. Do; comes from
    C. Are; come from    D. Are; from
23.I like watching TV very much. It_______ me_______ great.
 A. makes; feel                      B. makes; feeling
 C. make; feel                        D. make; feeling