168 Most traffic accidents occurred because of tailgating, passing and changing lanes recklessly, force turning, and speeding to save time. (A)O(B)X

174 Turn off the engine first when pushing the motorcycle forward or backward to adjust the parking position. Hold on to both handles with both hands, watch out for the surrounding traffic, and do not make the adjustments while sitting on the seat and pushing with the feet. (A)O(B)X