摘要:What do you usually use mobile phones for? Sending text messages for fun? P1aying games? Well.mobile phones can do 1 more than that. 2 this year's Asian tsunami.mobile phones saved many 3 . More than l0.000 international phones were 4 when the tsunami hit.Police sent text messages to them and found more than 2.000.But how? People 5 the signal and found out 6 the tourists were. So.how can 7 small be so smart? Well here’s how! When you turn the phone on.it tries to find a signal.This signal comes from the telephone network. If you have a signal.you can see it on the phone’s screen.Sometimes.if the signal is weak.8 can be difficult to make a phone call. When the phone is finding a signal.it also sends a 9 to the telephone network.This message tells the station where the phone is. When you start to make a phone call.the telephone network tells telecommunications offices where you are. The office will find out who you’re calling then put you 10 to your friend! ( )1.A.very B.so C.far D.1ittle ( )2.A.While B.During C.At D.When ( )3.A.1ives B.animals C.houses D.troubles ( )4.A.doing B.working C.functioning D.using ( )5.A.heard B.1istened C.followed D.examined ( )6.A.how B.where C.what D.why ( )7.A.something B.nothing C.everything D.nothing ( )8.A.he B.it C.they D.you ( )9.A.information B.word C.message D.note 10.( )A.off B.up C.on D.through

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