A _________ stick will be helpful if you go climbing mountains. A: walk B: walking C: walker D: walkers

9. It is implied that there will be fewer road accidents if ______. A: the drivers are more considerate of other people B: there are fewer cars or walkers in the street C: the motorists are not always in a hurry D: the passengers are calm but not confused before the accidents

What is the author's main purpose in writing the passage A: To show that the motor vehicle is a very dangerous invention. B: To promote understanding between careless drivers and street walkers. C: To discuss traffic problems and propose possible solutions. D: To warn drivers of the importance of safe driving.