safty of traffic
taffic is a important thing in our life.it can keep us safe.but it can take our life away,too if you don't careful them. we must keep us safty.but what shall we do?let me give you some advise: 1.we must cross the zebra-crossing carefully. 2.if you ride bike to scholl every day,you should fix you bike if it broke.don't ride so fast on the street.it's very dangerous to do that. 3.some car don't obey traffic rules.so you must vigilance（警觉）somebody. i only want to say these.you rememeber:safty
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