(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.