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閱讀理解。

                              Thumbs Down to Texting 屈指發短信
     Do you have a mobile phone? Do you send text messages to your friends and family?
     Text messaging or "texting" is becoming very popular. But, scientists have discovered that texting can
give us problems with our hands. Be careful! Too much texting can cause swelling in our thumbs. Our
thumbs were not made for pushing small buttons, over and over. Scientists call this problem RSI. We spoke
to a doctor called Harriet Wilson, who treats many sick people with RSI. She says we need to see how much
time we are spending in typing text messages. If we are spending more than 10-15 minutes at once, we could
have problems in the future.
     As mobile phones develop, they are getting smaller with buttons closer together. Texting with a smaller
phone is worse than using a larger phone with bigger buttons. Using a computer keyboard and playing video
games can cause the same problem. So more and more people could find themselves with RSI. Among them,
most are university students and teenagers, as they do not know the risks of spending so much time using
computer, video games and mobile phones. If we don't do something about this, too many young people could
grow up in terrible pain.

1. What is becoming very popular now?
    ____________________________________
2. Does the word "once" mean "one time" in the second passage?
    ____________________________________
3. What kind of people are easier to have the problem of RSI?
    ____________________________________
4. What can also cause RSI except texting?
    ____________________________________
5. Which is easier to cause the problem of RSI, using smaller mobile phones or larger ones?
    ____________________________________

1. Texting. / Text messaging. / Sending text message.
2. Yes. / Yes, it does.
3. University student and teenagers. / Young people. / Young learners.
4. Using a computer keyboard and playing video games.
5. Using smaller mobile phones. / Using smaller ones.
(答案不唯一)

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