Unit2WaystogotoschoolHowmanytransportationsdoyouknow?planeshiptrainsubwaycarbusbiketaxionfootbustrainshipsubwaycarplanetaxibikeonfootslowdownslowdownstopMrsearlyhelmetmustwearattentionpayattentiontotrafficlightsexercise锻炼pneal________________sbaywu_______________onwd________________yrale_______________eetlmh_______________tnetiotan______________eraw___________________itxa____________________fctarfi_________________lswo___________________