三、阅读理解。
阅读下面短文，从每小题所给的A、B、C三个选项中选择最佳答案。
Dear students, welcome to our school lab(实验室). I'm very happy to show our school lab to you. Before doing experiments(实验), there are a few safety rules to follow.
(1) Always remember to be careful in the lab.
(2) Don't eat or drink in the lab.
(3) Don't talk loudly.
(4) Don't run or play here.
(5) Don't disturb(打扰) others when they do experiments.
(6) Don't bring things into the lab to do experiments.
(7) Follow the teachers' instructions to do experiments.
(8) Ask the teacher for help if you have any questions.
(9) Don't touch anything until the teacher asks you to do so.
(10) Put all the things back after you finish the experiments.
(11) Close all the windows and the doors before you leave.
These rules in our school lab are very important to our safety. I hope you can remember them and follow the rules.
1. The rules are for .
A. students B. teachers
C. doctors
2. First of all, you must always remember to in the lab.
A. ask questions B. bring things
C. be careful
3. What does the underlined word "instructions" mean in Chinese?
A. 鼓励 B. 说明 C. 答案
4. Which of the following is NOT true?
A. We can't play or eat in the lab.
B. We can bring our own things to the lab.
C. We should close the windows before leaving.
5. When you finish the experiments, you should .
A. leave right away
B. put all the things back
C. talk with your classmates

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

【分析】本题为英语阅读理解题，需先通读短文，明确短文介绍的是学校实验室的安全规则，针对每道小题，回到原文定位相关信息，逐一分析选项，选出最佳答案。
【解析】1. 根据短文开头“Dear students”及全文内容，可知这些规则是针对学生的，故选A。
2. 根据规则第一条“Always remember to be careful in the lab”，可知在实验室首先要记得小心，故选C。
3. 结合语境“Follow the teachers' instructions to do experiments”，做实验需遵循老师的说明，故“instructions”意为“说明”，选B。
4. 根据规则(6)“Don't bring things into the lab to do experiments”，可知不能带自己的东西到实验室，B选项表述错误，故选B。
5. 根据规则(10)“Put all the things back after you finish the experiments”，可知实验结束后要把所有东西放回原处，故选B。
【答案】1.A 2.C 3.B 4.B 5.B
【知识点】阅读理解细节理解、词义猜测
【点评】本题围绕学校实验室安全规则设置题目，考查学生对短文细节的查找、词义猜测及信息判断能力，整体难度适中，仔细阅读短文即可轻松解答。
【难度系数】0.8