2014西宁英语中考完形填空cell phones are very useful and th

2014西宁英语中考完形填空cell phones are very useful and th
y're great fu

Cell phones are very useful and they're great fun.But cell phones do have risks.If you have one，it is necessary to understand these risks，and learn __11__ enjoy your phone safely.__12__ can be a wonderful way to keep in touch with your friends.But bad people can also send messages.If you receive a rude or terrifying message，do not reply or forward (转发) it.__13__，
save the message and show it to your teachers or parents.If you receive a message saying that you __14__ a big prize，don't believe it. Sending pictures from a cell phone is fast， easy and fun.But make sure you send only pictures that you wouldn't mind other people __15__．And you are more likely to have an accident if you try to use your cell phone while __16__ the road.There are cars and buses to watch out for！Hang up your cell phone __17__ you walk. With your parents' help，you can keep your cell phone's __18__，you won't have to worry about receiving unwanted calls or messages！Remember not to talk on the cell phone too often or too long.Your parents will be __19__ if you spend too much money.__20__ your cell phone when you sleep.The sounds of rubbish messages may wake you up. (B)11.A.how B．how to C．what D．what to (C)12.A.Send messages B．Use cell phones C．Sending messages D．Us