It seems parents have long been right. Going to bed early is key to getting enough sleep and helping adolescents feel on top of the world, a new study reported.

A   1   of sleep among youngsters may    2   depression and suicidal (自杀的)thoughts, according to the study by the Columbia University Medical Center.

"Our results are   3   with the theory that inadequate sleep is a risk factor for depression, working with other   4   and protective factors through multiple possible causal pathways to the development of this   5   disorder," said lead author James Gangwisch.

"  6   quality sleep could therefore be a preventative measure against   7  and a treatment for depression," he added in the study   8   in the Friday issue of Sleep magazine.

The study followed the nightly habits of some 15,659 college and high-school students, and   9  those who consistently went to bed   10  midnight had a 24 percent higher risk of depression than those who turned in before 10:00 pm.

Night owls（夜猫子）also ran a 20 percent   11  risk of battling suicidal thoughts, the study added.

The American Academy of Sleep Medicine   12   that adolescents should sleep at least nine hours or more a night. Those who were tucked in before 10:00 pm reported they slept    13   about eight hours and 10 minutes.

But that amount of sleep   14  significantly for those in bed after midnight.

And adolescents who slept five hours or less a night were 71 percent more   15  to suffer depression and 48 percent more     16   becoming suicidal, the study said.

"It is a common perception and societal   17  that adolescents do not need as much sleep as pre-adolescents, yet studies suggest that adolescents may  18   require more sleep," said Gangwisch.

"Studies have found that adolescents do not go to bed   19  enough to make up for earlier school start times, and transitions to earlier school start times have been shown to be   20  with significant sleep deprivation（剥夺）. "

(    ) 1. A. night                B. moderation       C. limit                D. lack

(    ) 2. A. result in           B. lie in                C. come about       D. bring in

(    ) 3. A. opposed           B. mixed              C. related              D. consistent

(    ) 4. A. risk                  B. chance              C. potential           D. reason

(    ) 5. A. mood                      B. body                C. feeling             D. mind

(    ) 6. A. little                B. lack                 C. Adequate          D. over

(    ) 7. A. suffering          B. depression               C. disorder            D. sadness

(    ) 8. A. reported           B. published          C. reflected           D. noted

(    ) 9. A. found                      B. investigated      C. appraised          D. supported

(    ) 10. A. before            B. from                C. by                    D. after

(    ) 11. A. lower             B. higher              C. more                D. less

(    ) 12. A. appeals           B. recommends     C. calls                 D. plans

(    ) 13. A. on average      B. in place            C. ahead of           D. in number

(    ) 14. A. increased               B. disappeared       C. strengthened     D. dropped

(    ) 15. A. likely             B. probable           C. possible            D. perhaps

(    ) 16. A. at sight of       B. at risk of          C. in front of               D. as a result of

(    ) 17. A. wish               B. expectation       C. suggestion               D. attempt

(    ) 18. A. exactly           B. immediately      C. directly            D. actually

(    ) 19. A. early              B. lately                      C. soon                 D. quickly

(    ) 20. A. separated               B. associated         C. divided             D. depended

 He couldn’t ____ the noise, so he kept the windows shut all day long.

A water bearer in India had two large pots;  each hung on the ends of a pole. The water bearer often  carried the pole __36__ his neck. One of the pots had a crack(裂缝) in it, __37__ the other pot was perfect and always delivered a full portion of water. At the end of the long walk from the stream to the house,  the cracked pot __38__ only half full. For a full two years,  this went on __39__，  with the bearer delivering only one and a half pots full of water to his house.

Of course,  the perfect pot was __40__ of its advantages. But the poor cracked pot was ashamed of its own imperfection,  and __41__ that it was able to __42__ only half of what it had been made to do.  __43__ two years of what  sensed to be a bitter __44__，  it spoke to the water bearer one day by the stream. “I am ashamed of myself,  and I want to __45__ to you. I have been able to  __46__ only half my load because this crack  in my side __47__ water to leak out all the way back to your house. Because of my __48__，  you have to do a lot of this work,  and you don't get full value from your __49__，”  the pot said.

 The bearer said to the pot,  “Did you __50__ that there were flowers only on your side of the path,  __51__ not on the other pot's side? That's because I have always __52__ your fault,  and I planted flower seeds on your side of the path,  and every day while we walk back,  you've __53__ them.

For two years I have been able to __54__ these  beautiful flowers to decorate the table. Without you being just the __55__ you are,  there would not be this beauty to grace the house.”

36．A.above　　  B．over　　　  C．across　　　  D．through

37．A.as                        B．while                  C．when                    D．so

38．A.arrived                 B．realized            C. made                 D．concluded

39．A.weekly          B．daily                        C．monthly                    D．yearly

40．A.ashamed                B．proud        C．happy              D．disappointed

41．A.sad                             B．pleased                   C．comfortable                D．safe

42．A.admit      B．achieve      C．reduce         D．attract

43．A.Before                  B. Since                      C．After                     D．By

44．A.failure                  B．success                 C．excitement            D．satisfaction

45．A.apologize                  B. talk                         C．admit                    D．apply

46．A.develop         B．permit     C．depend           D．deliver

47．A.takes                    B．causes                   C．makes                   D．reminds

48．A.fault              B．success                 C．kindness                D．sorrow

49．A.effects                 B．efforts                   C．operation                      D．attempt

50．A.look                            B．pay                       C．notice                   D．watch

51．A.but                             B．and                              C．since                     D．after

52. A．known about  B．told about C．worried about       D．come about

53．A.cared                   B．watered              C．planted                  D．pulled

54．A.pick     B．buy               C．sell         D．borrow

55．A.attitude                B．way                          C．measure            D．appearance

The scientists are beating their brains trying to _______ a solution to the problem.

A．come about        B．come across       C．come out          D．come up with

How did it come about that you failed to ______ in time for the meeting yesterday?