(1) How does the man feel about David’s way of sleeping?
A)It’s effective
B)It’s strange
C)It’s the best
(2) How many hours does David sleep a day?
A)Four
B)Six
C)Seven
(3) What does the woman suggest at the end of the talk?
A)People should develop a habit like David’s.
B)People need longer hours of sleep.
C)People have different sleeping habits.
原文：
M: How come David is always so full of energy?
W: He has a strange but highly effective way of sleeping.
M: What is that?
W: He takes a short sleep for an hour every six hours and has a total of four hours of sleep each day.
M: Where did he get that strange idea?
W: He read from a book which said it was the best way for human beings, and he believed it.
M: How many hours do you sleep a day?
W: I need at least 7 hours. I once tried to follow David’s example, but it never worked out for me.
M: If I sleep during the day, I can never wake up.
W: Not everyone is a David I guess.