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1．_________Many people write on paper only one side .Why not try using both sides? Some students only use half the pages in their notebooks before getting new ones. Try to set up all the paper. People often give cards on festivals. How about trying sending e-mails instead .
2．_________There're many poor families in China. You may ask your parents to keep your unwanted clothes. Then you can pass them to poor kids. You'll feel happy that you are helping someone else. Also, you can see if your friend wants them before throwing them away
3．_________In San Francisco of the US, there is a beautiful bridge. It took more than four years to build it, and it was finished in 1937. You can cross the bridge by car or on foot, but you must pay. Do you know the bridge? Yes, it is the Golden Gate.
4．_________Many people can use computers, but few of them know how to use them correctly. Remember the following when you use your computer. Keep your computer in a cool, dry room; don't put water or food near your computer; keep your screen clean and not too bright
5．_________E-mail means messages sent from one computer to another. It is becoming more and more popular. You can send and receive e-mail everywhere. It is quick to use e-mail, and it is much cheaper than long-distance telephone call .
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