1. (2017·新课标Ⅲ) 听第10段材料，回答小题。

Hello, everyone. My name is John. I'm the teaching assistant for this lab session.<br />Let me explain a little about it. As you may know already, it's a required meeting once<br />a week. I expect you to do all the experiments and keep the results in your lab notebook.<br />I'll collect the notebooks every two weeks. You'll be graded on lab notebooks and quizzes.<br />But the most important information I want to give you now is about safety.<br />First of all, you must wear shoes that cover your feet in the lab. Tennis shoes are okay.<br />Also don't wear loose clothes, long scarves, big necklaces, or loose belts. They get caught<br />in something or fall into liquid. Another thing to do for safety is cleaning<br />up. Be sure to put the waste in the correct containers. We can't mix liquid with paper.<br />This is extremely important. I don't want any fires in this room.<br />You are responsible for washing out your own lab equipment and putting it away. If you don't do<br />this, I will take away points from your grade. Nobody's going to clean up after you. Okay,<br />any questions? Hello, everyone. My name is John. I'm the teaching assistant for this lab<br />session. Let me explain a little about it. As you may know already, it's a required meeting<br />once a week. I expect you to do all the experiments and keep the results in your lab notebook.<br />I'll collect the notebooks every two weeks. You'll be graded on lab notebooks and quizzes.<br />But the most important information I want to give you now is about safety. First of all,<br />you must wear shoes that cover your feet in the lab. Tennis shoes are okay. Also don't wear loose<br />clothes, long scarves, big necklaces, or loose belts. They get caught in something or fall<br />into liquid. Another thing to do for safety is cleaning up. Be sure to put the waste in the<br />correct containers. We can't mix liquid with paper. This is extremely important. I don't want<br />any fires in this room. You are responsible for washing out your own lab equipment and putting<br />it away. If you don't do this, I will take away points from your grade. Nobody's going to clean<br />up after you. Okay, any questions?

1. （1） How many lab sessions will the students have every week?

   A . One. B . Two. C . Three.
3. （2） What are the students allowed to wear in the lab ?

   A . Long scarves. B . Loose clothes. C . Tennis shoes.
5. （3） Why should the students avoid mixing liquid with paper?

   A . It may cause a fire. B . It may create waste. C .   It may produce pollution.
7. （4） What does the speaker mainly talk about?

   A . Grades the student will receive.    B . Rules the students should follow.     C . Experiments the students will do.