听力原文:W: Debra says she's going to stay up all night studying for her exam tomorrow mor
M: Wouldn't she be better off getting a goodnight's sleep so she'll feel fresh in the morning?
Q: What does the man imply?
(15)
A.Nothing can help Debra pass the exam.
B.Debra doesn't need to study at all.
C.Being well rested will help Debra on the exam.
D.Debra should get some fresh air in the morning.