1. (2017·新课标Ⅱ卷) 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 a week.<br />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.<br />They get caught in something or fall into liquid.<br />Another thing to do for safety is cleaning up.<br />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.<br />If you don't do this, I will take away points from your grade.<br />Nobody's going to clean up after you. Okay, any questions?<br />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 a week.<br />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.<br />Tennis shoes are okay. Also, don't wear loose clothes, long scarves, big necklaces, or loose belts.<br />They get caught in something or fall into liquid.<br />Another thing to do for safety is cleaning up.<br />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.<br />If you don't do this, I will take away points from your grade.<br />Nobody's going to clean up after you.<br />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