Don't run __the street while the traffic lights are red?A.through B.over C.across

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• Don't run __the street while the traffic lights are red?A.through B.over C.across
• Traffic rules are very important to us all.If you don’t know them well,it may be 31 .32 the pedestrians(行人),we have as many rules as the drivers.You should walk at the sidewalk 33 at tile(瓷砖)side of the road.Always look carefully before you walk across the street.If you like riding a bike,don’t ride in the middle of the road or run 34 the street when the traffic lights are red.35 you ride a bike with a friend,don’t look around to talk .If you 36 a car
• traffic rules help to keep order on the road完形填空填答案Traffic rules help to keep order on the road. They also help to keep people 26 .The pedestrian(行人) has as many rules to 27 as the driver of a car. You should walk on the sidewalk(人行道) or at the side of the road. Always look 28 before you walk across the street.If you like riding a bike, don’t ride in the middle of the road or run 29 red traffic lights. When you ride a bike with a friend, don’t look ar
• 若一次函数y=kx-（2k+1）是正比例函数，则k的值为_．
• 利用数轴解答：有一座三层楼房不幸起火，一位消防队员搭*爬往三楼去救人，当他爬到*正中一级时，二楼窗口喷出火来，他就往下退了3级，等到火过去了，他又爬了7级，这时屋顶