1. (2017·新课标Ⅲ) 听第10段材料，回答小题。

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.