7.________

　　their normal life and work are affected. To the children ________ spend too much

　　8._____ ___

　　time in surfing the Internet, it can do harm to ________ sight and health.9.________

　　So we should control the time of ________(使用)computers.10.________

　　答案：1.common　2.spare　3. part　4.advantages　5.happening　6.about　7.waste　8.who　9.their　10.using

　　短文改错

　　Attention please, everyone. We accepted the weather forecast on the radio this morning that there will have a heavy rain tonight. Be sure shut the windows and doors until you leave your classrooms. The sports meeting that we planned to hold on tomorrow will be put off. After it becomes fine, we'll make other announcement. We will have classes on Wednesday as usually. Since it is colder tomorrow, please dress on more clothes in time. Those who comes to school by bike, don't keep your umbrella open while riding.

　　答案：第二句：accepted→received；have→be　第三句：sure后加to; until→before　第四句：去掉hold 后的on　第五句：other→another　第六句：usually→usual　第七句：dress→put　第八句：comes→come; umbrella→umbrellas

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