B.Meet some singers.
C.Prepare something to eat.
听第7段材料,回答第8至10题。
8.Where does the conversation take place?
A.In the chemistry lab.
B.In the sound lab.
C.In a factory.
9.What should be done there?
A.Put on the earphones as soon as getting into the lab.
B.Knock the machine if there is anything wrong with it.
C.Follow the instructions and take care of everything.
10.What is the man?
A.A teacher.