1. (2020·道外模拟) Nowadays students' safety has become a big problem. Students should learn how to save lives and know how to stop danger before it really happens. As a student, you will be much safer if you __________.

①don't walk alone outside at night

②fight with the stranger who is following you

③don't use earphones when running in the schoolyard or on the street

④never cross the street until the traffic lights turn green and all the traffic stops

⑤accept anything to drink offered from others on a bus or a train