---- Mummy, can I go out for a play for a while?
---- Yes, if you _______. But make sure you e back before 8:00.
A. shall B. will C. must D. could
---- Mummy, can I go out for a play for a while?
---- Yes, if you _______. But make sure you e back before 8:00.
A. shall B. will C. must D. could
C