51.What do you need to do if you want a red car behind you to overtake?
(A) stop your car and wait for the red car.
(B) move your car to the center of the road.
(C) swing your right arm in a circular motion.
(D) swing your right arm up and down
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統計: A(2), B(5), C(22), D(7), E(0) #1965335
統計: A(2), B(5), C(22), D(7), E(0) #1965335