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Unit 7 Be Careful!Part ALets learnstop 停止停止wait 等待等待turn right 右转右转turn left 左转左转traffic lights 交通灯交通灯cross the street 过马路过马路Lets talk Be careful!Look at the traffic lights.Its red.Dont cross the street.Stop and wait.The light is green.We can go now.Lets go.Be careful!The light is yellow.We should wait.All right.Goodbye!See you next time.