276. For a canceled driver's license, one should (A) keep it personally, (B) return itto the motor vehicle supervision authority, or (C) continue to use it.

279.When hearing the sirens of a fire truck, police vehicle, ambulance,engineering rescue vehicle, or hazardous chemical disaster response vehicle,regardless of direction, one should (A) not yield, (B) not yield as long as notcrossing the line, or (C) immediately yield and must not follow closely behind.