--How 1ong him? --For five years. [ ] A．did you know B．have you known C．did you get to know D．have you got to know 题目和参考答案——青夏教育精英家教网—

C
RIDING in school buses in the early morning，then sitting in poorly lit classrooms，are the main reasons students have trouble getting to sleep at night，according to new research．
Teenagers，like everyone else，need bright light in the morning to allow their circadian rhythms(生理节奏)to get into step with nature's cycles of day and night．
If they don't get blue 1ight in the morning，they get to sleep an average of six minutes later at night，until their bodies are completely out of sync(同步) with the school day，researchers from Rensselaer Polytechnic Institute in New York said last month．
The finding was made by fitting goggles(护目镜)that block blue light from the sun to a group of students．The researchers discovered that their circadian rhythms were greatly affected．
Parents and teachers have been complaining in recent years that teens stay up too late at night，then fall asleep in class the next morning and do poorly in school．The new findings provide a possible explanation for the problem．
At the root of the research is the circadian rhythm, the body's natural sleep and waking cycle．Even though the Earth makes a full rotation(旋转)in 24 hours，the body's circadian cycle is about 24 hours and six minutes 1ong．The cycle is mediated(调节)by a chemical called melatonin(褪黑激素)．The body starts to produce it about two hours before it is time to sleep and, in the absence of blue 1ight，the body produces about six minutes later each day.
In the study, the researchers studied 11 students at Smith Middle School in New York, which was designed so that a lot of sunlight reaches classrooms．
On a Friday night，the researchers measured what time the 11 students’ bodies began releasing melatonin．On Monday morning，the students were sent to school with orange goggles that blocked most blue light from their eyes to mimic(模拟) the conditions found in many---if not most--schools．
By the end of the week，the students were releasing melatonin 30 minutes 1ater in the evening---an average of six minutes a day--and going to sleep correspondingly(相应的) later．
“This is our first field study，”said lead author Mariana G．Figueiro．He said they would like to repeat it in larger studies and for longer periods of time。
If the findings are repeated，a variety of solutions are available．Ideally, new schools would be built to allow more natural sunlight into the classrooms．Students could also be exposed to more sunlight outside．
68. According to the findings related in this article, many teenagers stay up late because_______
A. they lack melatonin in their bodies
B. they have to get up so early to catch the school bus
C. their circadian rhythms are in disorder
D. they do not get enough blue light in the morning
69. According to the findings, a student who normally slept at 10:00 pm, but who spent 10 days in a poorly lit classroom, would probably be falling asleep at___________after the period.
A. 12:00pm B. 11:30pm C. 11:00pm D. 10:00pm
70. What does the article tell us?
A. Unlike adults, teenagers tend to feel sleepy during daytime.
B. The sunlight is the only thing that can affect our circadian rhythms.
C. If the findings prove correct, solutions could be found to teen sleeping problems.
D. Most schools have small windows and the classrooms are poorly lit.
71. The main point of the article is to___________
A. warn teenagers not to stay up late or sleep in class
B. report on some new findings related to teenagers' sleeping problems
C. give suggestions on how to build schools
D. advertise goggles which can protect the eyes from the sun

C

RIDING in school buses in the early morning，then sitting in poorly lit classrooms，are the main reasons students have trouble getting to sleep at night，according to new research．

Teenagers，like everyone else，need bright light in the morning to allow their circadian rhythms(生理节奏)to get into step with nature's cycles of day and night．

If they don't get blue 1ight in the morning，they get to sleep an average of six minutes later at night，until their bodies are completely out of sync(同步) with the school day，researchers from Rensselaer Polytechnic Institute in New York said last month．

The finding was made by fitting goggles(护目镜)that block blue light from the sun to a group of students．The researchers discovered that their circadian rhythms were greatly affected．

Parents and teachers have been complaining in recent years that teens stay up too late at night，then fall asleep in class the next morning and do poorly in school．The new findings provide a possible explanation for the problem．

At the root of the research is the circadian rhythm, the body's natural sleep and waking cycle．Even though the Earth makes a full rotation(旋转)in 24 hours，the body's circadian cycle is about 24 hours and six minutes 1ong．The cycle is mediated(调节)by a chemical called melatonin(褪黑激素)．The body starts to produce it about two hours before it is time to sleep and, in the absence of blue 1ight，the body produces about six minutes later each day.

In the study, the researchers studied 11 students at Smith Middle School in New York, which was designed so that a lot of sunlight reaches classrooms．

On a Friday night，the researchers measured what time the 11 students’ bodies began releasing melatonin．On Monday morning，the students were sent to school with orange goggles that blocked most blue light from their eyes to mimic(模拟) the conditions found in many---if not most--schools．

By the end of the week，the students were releasing melatonin 30 minutes 1ater in the evening---an average of six minutes a day--and going to sleep correspondingly(相应的) later．

“This is our first field study，”said lead author Mariana G．Figueiro．He said they would like to repeat it in larger studies and for longer periods of time。

If the findings are repeated，a variety of solutions are available．Ideally, new schools would be built to allow more natural sunlight into the classrooms．Students could also be exposed to more sunlight outside．

68. According to the findings related in this article, many teenagers stay up late because_______

A. they lack melatonin in their bodies

B. they have to get up so early to catch the school bus

C. their circadian rhythms are in disorder

D. they do not get enough blue light in the morning

69. According to the findings, a student who normally slept at 10:00 pm, but who spent 10 days in a poorly lit classroom, would probably be falling asleep at___________after the period.

A. 12:00pm B. 11:30pm C. 11:00pm D. 10:00pm

70. What does the article tell us?

A. Unlike adults, teenagers tend to feel sleepy during daytime.

B. The sunlight is the only thing that can affect our circadian rhythms.

C. If the findings prove correct, solutions could be found to teen sleeping problems.

D. Most schools have small windows and the classrooms are poorly lit.

71. The main point of the article is to___________

A. warn teenagers not to stay up late or sleep in class

B. report on some new findings related to teenagers' sleeping problems

C. give suggestions on how to build schools

D. advertise goggles which can protect the eyes from the sun

第二节：完形填空（共20小题；每小题1．5分，满分30分）

从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

On his way to the airport one afternoon，Phillip asked the driver to wait outside the bank while he collected some traveler’s checks．

The plane was to 36 at 5：30．From the bank，there was still a 37 journey to the airport38 Phillip merely enjoyed the scene along the way．Shortly before arriving，he began 39 the things he would need for the 40 ：tickets，money，the address of his hotel，traveler’s checks…Just a moment! How about his passport? Phillip went through his pockets．He suddenly 41 that He must have left his passport 42 ．

What could he do? It was now five past four and there would be too little 43 to return for the passport．This was the 44 time he was representing his company for an important meeting 45 the manager of a French company in Paris the following morning Without a passport he would be 46 to board the plane At that moment，the taxi 47 outside the air terminal(候机楼)．Phillip got 48 ，took his suitcase and paid the driver．He then 49 a good deal of confusion(混乱)in the building．A 50 could be heard over the loudspeaker，“We very much 51 that because of a twenty—four—hour strike(罢工)of the airport staff，all flights for the rest of today have had to be called off” Passengers are 52 to get in touch with their travel agents or with this terminal foron tomorrow’s flights．Phillip was very glad to hear that．He would let his company know about this 54 and，thank goodness．he would have the opportunity of calling at the bank the next morning to 55 his passport．

36．A．check in B．1ead off C．take off D．go up

37．A．1ong B．short C．pleasant D．rough

38．A．as B．so C．but D．because

39．A．buying B．taking C．putting D．checking

40．A．plane B．trip C．company D．flight

41．A．realized B．promised C．recognized D．suggested

42．A．at home B．at the bank C．at the office D．in the taxi

43．A．time B．chance C．possibility D．use

44．A．golden B．1ast C．only D．first

45．A．in B．to C．at D．with

46．A．sad B．unable C．nervous D．Difficult

47．A．stopped B．ran C．went D．opened

48．A．off B．back C．out D．away

49．A．started B．caught C．noticed D．1eft

50．A speech B．signal C．call D．voice

51．A．apologize B．announce C．worry D．regret

52．A．advised B．forced C．allowed D．persuaded

53．A ideas B． plans C．information D．time

54．A．person B．situation C．place D airport

55．A．return B．show C．recover D．change

阅读下面短文，从短文后各题所给的四个选项（A、B、C、和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

After spending a weekend away with my adult son, I was so impressed by his generous heart that I sent him this letter.

Dear son,_36502119

I want to thank you for teaching me a very 1lesson in life by the great example you 2. When we were eating at that café in Bondi and a person who had 3his hamburger didn’t have enough money to pay for it, without any 4, you went over and put the 5$2 into his hand.

When we were leaving, you 6threw a five-cent coin onto the pavement and said 7like, “Some kid will really enjoy 8this.”

Last week, a young man 9me in the line at a petrol station didn’t have 10money to pay for his petrol. I asked the money collector, “How much 11is he?” She told me he had meant to put $15 of

petrol in his car 12he had been looking at the wrong gauge（计量表）and had put in 15 13, which came to just over 14. That is an easy mistake 15both gauges run fast.

Something made me think of you and 16you did that night at the café in Bondi. I handed the man $6. He was so 17and said, “But why would you do this for me?” I just smiled as I thought of you.

Thank you, son, for teaching me that “it’s 18to give than receive”. Now when I see a five-cent coin on the 19and want to pick it up, I think of you and leave it 20, just in case some kid will get a kick out of finding it.

1.A. humorous B. private C. reasonable D. valuable

2.A. followed B. gave C. set D. took

3.A. ordered B. booked C. offered D. bought

4.A. hesitation B. doubt C. permission D. difficulty

5.A. other B. last C. extra D. rest

6.A. again B. already C. only D. also

7.A. nothing B. everything C. anything D. something

8.A. finding B. accepting C. looking for D. pointing at

9.A. behind B. beyond C. ahead of D. next to

10.A. much B. some C. any D. enough

11.A. far B. 1ong C. short D. high

12.A. and B. but C. SO D. while

13.A. 1itres B. kilograms C. pounds D. kilometers

14.A. $15 B. $20 C. $25 D. $30

15.A. until B. as C. although D. unless

16.A. what B. which C. whatever D. whichever

17.A. excited B. surprised C. interested D. encouraged

18.A. easier B. better C. faster D. worse

19.A. comer B. way C. ground D. carpet

20.A. there B. here C. out D. around

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