--- Would you like to come to dinner tonight? --- I'd like to, _____I'm to busy.
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
You ___ a girl.A.am B. is C. are