三、阅读下面短文，从短文后框内的选项中选出可以填入空白处的最佳选项。选项中有一项为多余选项。
Rules are everywhere—in school, at home, and in public places. They help keep things safe and fair(公平的) for everyone. Let's talk about the rules in the computer rooms.
1. Students can learn and practise using computers in the computer room. To keep the computer room clean and safe, everyone must follow the rules.
Be respectful. Always listen to the teacher. Do not shout or run in the computer room. 2.
Keep the computer room clean. No food or drinks near the computers. 3. And keep your workspace tidy.
Use computers in the right way. Ask your teacher for permission(允许) before you want to look up something on the Internet. Do not download(下载) or delete files(删除文件) without permission. 4.
Work safely. Do not touch wires or plugs(电线或插头). Tell the teacher if something doesn't work. Do not play games on the computer. By following these rules, we can make the computer room a better place for everyone!
Rules may sometimes seem awful, but they can keep us away from danger. 5. By following rules, teachers can teach better, and we can focus on learning computer skills.

1.B 2.F 3.A 4.E 5.C

1. 第一空后句介绍学生可以在微机室学习练习使用电脑，引出微机室的相关规则，B选项“微机室是一个特殊的地方”可以自然引出下文内容，符合语境。
2. 第二空所在段落主题为“保持尊重”，前文提到要听从老师指令、不在微机室喧哗奔跑，F选项“爱护电脑和其他设备”属于该主题下的行为要求，衔接自然。
3. 第三空所在段落主题为“保持微机室整洁”，前文提到电脑附近不能放置食物和饮品，A选项“不要到处乱扔垃圾”是保持环境整洁的具体要求，和后文“保持你的工作区域整洁”呼应。
4. 第四空所在段落主题为“正确使用电脑”，前文提到上网、下载/删除文件都需要征得老师同意，E选项“用完电脑后要关闭它”是正确使用电脑的合理规则，符合段落主题。
5. 第五空前文提到规则可以让我们远离危险，后文提到遵守规则能让老师更好授课、我们专注学习电脑技能，C选项“它们可以帮助我们专注于学习”可以衔接前后，说明规则的益处，剩余D为多余选项。