6.听下面一段独白,回答第12-15四个小题.现在,你有20秒钟的时间阅读这四小题.
12.Which of the following pictures shows the professor's experiment?
13.According to the professor,which of the following is the most important in our life?
A.Family.
B.Job.
C.Money.
14.What does the jar stand for in this story?
A.Our house.
B.Our car.
C.Our life.
15.Why did the professor do the experiment?
A.To tell us how to fill something to make the jar full.
B.To tell us what the most important thing is in our life.
C.To tell us how to do an important experiment.