请选择ABC+C3c9R)Y+I-}7b7g'WWe ____going to fly kites.,A9_2f6U(l(f(O4w
A. is,A9_2f6U(l(f(O4w
B. am,A9_2f6U(l(f(O4w
C. are,A9_2f6U(l(f(O4w