听材料，回答题。
（1）How many pieces of safety advice does the woman give the teens？
A.4.
B.5.
C.6.
（2）Why are some people not careful in swimming？
A.The swimming pool is quite safe.
B.They believe swimming is a safe sport.
C.They think they are very good swimmers.
（3）Why can't we eat any food while swimming？
A.We can't breathe easily.
B.The water will be polluted.
C.It is easy to put on weight.
（4）What should we pay attention to before going swimming？
A.Clothing.
B.Weather.
C.Time.
（5）What may Teen Time probably be？
A.A newspaper for teenagers to read.
B.A TV or a radio show for teenagers.
C.A book about teenagers' favorite sports.