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Bad weather sometimes causes natural d_.And it often brings us more life problems.Winter is the most d_driving season because of many reasons,including wind,fog,ice,s_andso on.For example,f_ makes it difficult for us to see clearly.Ice often sends us o_ the road .If youride,your bicycle may s_ go into a slide.If you drive,it takes l_ to stop the car.So,remember that every time you start or s_your car or bicycle,you must be gentle and slow.Be c_ of the car in fornt of you.A sudden quick movement or stop may get you in d_.