【Ifyouwanttoprotect（保护）yourself，pleaserememberthefollowingwaysofinformation．Thesewayswillmakeyousafe．Don'tuseearphones（耳机）whenyouarerunningintheschoolyardorinthestreet．Youwillkeepyourselffrom】

　　If you want to protect （保护） yourself，please remember the following ways of information．These ways will make you safe．

　　Don't use earphones （耳机） when you are running in the school yard or in the street．You will keep yourself from the outside world and can easily get into trouble．

　　If a stranger is following you，please don't go home directly．You may be safer in the street than you are in your home or in a lift．If necessary，please go and get help from others．

　　When you take a bus，don't sit alone．You should sit behind the driver or with friends．Don't sleep．Your school bag should be carried towards the front of your body．Don't put it on your back．

　　Don't play with matches （火柴） or candles （蜡烛），because it may cause fire．If it causes fire，please call 119．

　　46．We can't use___ when we are running in the street．

　　A．radios

　　B．watches

　　C．earphones

　　D．mobile phones

　　47．If a stranger follows you，you can't___．

　　A．get help from others

　　B．walk in the street

　　C．go home directly

　　D．call your friends

　　48．We should carry our school bags___ on the bus．

　　A．in front of our bodies

　　B．on the floor

　　C．on our backs

　　D．on the heads

　　49．We can sit___ on the bus．

　　A．alone

　　B．behind the driver

　　C．in front of the driver

　　D．with strangers

　　50．If it causes fire，___．

　　A．please call 999

　　B．please call 110

　　C．please call 120

　　D．please call 119．