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）。

on  first  give  change  it  letter  while  because  cheap  fast

The British love sending text messages. They send more than 2.5 billion every month. And most people now understand the language of text, with its numbers and missing    . In fact, when a student at a Scottish school wrote the whole article “in txt”, his teacher       him “C+ 4 f4t ” (“C+ for effort ”).
Although texting(发短信) is a     way of staying in touch with your friends, it can also bring problems. In 2005, a British teenager became the      person in the world to receive treatment for an addiction(沉溺) to text messaging. In one year, the nineteen-year-old spent about ￡4,500      texts.
For some people, text messaging has    their lives. For example, James Trusler from Sussex in England travels around the world taking part in texting competitions and TV shows. He’s the world’s    texter and recently set a new world record      he was appearing on Australian TV. He texted:“The razor-toothed piranhas of the genera Serraslmus and Pygocentrus are the most ferocious freshwater fish in the world. In reality they seldom attack a human.”     took him 67 seconds. James sends a lot of text messages—about 2,500 a month. But he doesn’t get big bills     he works for a large mobile phone company!

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