根据图片,从方框中选出相应选项填在括号里。
What ___ they playing ? A. are B. am C. is
What are they ____? A.matter. B. doing. C. look.
She is ____. A. this B. what. C.talking.
We ___ a happy family. A. a B. is C.are
My mother ___ a doctor . A.am B. is C. are