用方框中所给单词的适当形式填空，使短文通顺、正确、连贯(每个单词限用一次)。

slow,  save,  be,  computer,  no,  see,  with,  second,  put,  when

  Are you able to send a letter with pictures and sounds to someone anywhere in the world without 1 a stamp on it?  2  e-mails you can just do that. Using a  3  you can send e-mails quickly and easily. The post is much  4  than an e-mail. An e-mail can send its message to the other side of the world in 5  .
An e-mail is easy to use and it  6  time and money. The differences in time in different parts of the world do not matter  7  sending e-mails. It is twenty-four service that you can send e-mails at any time of the day time or night.  8  one has to be there to receive e-mails. It doesn’t matter if your friends  9  in bed when you send e-mails to them, or you are 10  a movie at the cinema when they send e-mails back.