（   ）4．A．doing               B．working         C．functioning     D．using

    （   ）3．A．1ives               B．animals          C．houses            D．troubles

    （   ）2．A．While              B．During           C．At                  D．When

    （   ）1．A．very                B．so                C．far                  D．1ittle

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!

    14．She______ （1eave） before I______ （get）to the restaurant yesterday．

    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（海啸），mobile phones saved many 3 ．

    13．She said she______ （return）the book to me soon but she______ （not return）yet till now．

    12．What a day!  It______ （rain） again．I'm afraid we can’t______ （1eave） now．

    11．Would you like me______ （show）you how______ （search）the Internet?

    10．Look at the families______ （enjoy） the sunshine on the grass．And the children______ （fly） kites happily．