Read and fill(根据所给汉语提示补充句子)
(1)I usually go to school                  (步行).
(2)Please          (停)and         (等)at a green light.
(3)        (怎样)do you come to school?
        (通常), I come                   (乘地铁)
(4)We must pay attention to the                   (交通灯)