5．Hair has always been an important sign of beauty，especially true for women．Next to the face，hair is one of the main qualities people look for when they consider a woman's beauty． Whether long or short，curly or straight，hair often gets a lot of attention．
Each hair grows independently of other hairs．Not all hairs experience the same period of growth at the same time．During the period of active growth，which is called Anagen，hair grows at a rate of about or one centimeter a month．About eighty five percent of hair follicles（毛囊） are going through this process at any given time．This period can last from two to six years．
The Catagen period of hair growth comes next．It is then that hair growth begins to slow down．This period usually lasts two or three weeks．Finally，hair growth comes to a complete stop and the hairs begin to fall out．This period is known as Telogen．Once the Telogen period has ended，the hair growth process begins again．
So what happens when a person has trouble growing hair or suffers from hair loss？Your genes control how fast or how long your hair will grow．Some people have a longer than usual anagen growth period．These people may be able to grow more hair than the average person．
However，others struggle to grow shoulder length hair．These people have a shorter than normal anagen period．
Your health can also affect hair growth．Poor nutrition can cause some hair follicles to stop growing or cause the hairs that grow to become weak or thin．Problems with hair growth can result from thyroid problems or other conditions．Health experts say people who experience a sudden increase in hair loss should seek medical advice．

68．How many periods of hair growth are discussed in the passage？B   
    A．Two．          B．Three．           C．Four．          D．Five．
69．The Catagen period is a period thatD．
    A．the hairs start to fall out                   B．the hairs grow at a fast rate
    C．hair growth stops completely                  D．hair growth begins to slow down
70．What can be learned from the passage？C
    A．Hair grows no more after the Telogen period．
    B．One with shoulder length hair must grow more hair．
    C．Hair growth has much to do with nutrition and health．
    D．Only a few hair follicles go through the Anagen period．
71．What is suggested by health experts when one suffers from a sudden increase in hair loss？B
    A．Changing his genes．                     B．Going to see a doctor．
    C．Cutting all his hair off．               D．Eating more vegetables．

4．      some teenagers don't realize is        difficult life can be after they get addicted to drugs．（　　）

A．

That：what a

B．

That；how

C．

What；what a

D．

What；how

3．Just as the manager says，      to take their adventure course will certainly learn many useful skills．（　　）

	A．	kids brave enough		B．	enough brave kids
	C．	brave enough kids		D．	kids enough brave

2．In English，if new words continue to be used for at least five years they generally______ the Oxford English Dictionary．（　　）

A．

come up with

B．

make up for

C．

look up to

D．

end up in

1．---Many people in big cities cannot enjoy life even though they have houses，cars and ideal jobs．
---Sub-health may partially ______ it．（　　）

A．

account for

B．

call for

C．

answer for

D．

stand for

20．Have you seen my dog？I        for it and still haven't found it．（　　）

	A．	looked		B．	was looking
	C．	have been looking		D．	had been looking

19．He strongly believes that the govemment will      a way to solve the problem of population．（　　）

A．

set off

B．

put off

C．

catch up with

D．

come up with

18．John Wesley Powell（1834-1902）Was a famous explorer of the American West．When he Was young，his mother put him under the guidance of George Crookham，a self-taught scientist，from whom he received a wide，but informal，education．Young John learned many things about the natural sciences．But his father preferred him to study religion．The argument continued for three years．Then John decided to leave home to seek further education．He soon discovered that he knew more about science than any teacher he met．He realized that the only good scientific education in the country came from colleges in the east，like Harvard and Yale．But he Was too poor to go to them，SO he got work as a school teacher in Illinois．Whenever possible，he went on scientific trips of his own．  
In 1861，civil war broke out in the United States．John joined the Union forces of the North．At the battle of Shiloh Powell lost his right arm．Despite his disability，he began his famous exploration of the Colorado River on May 24 1869．
It Was one of the greatest trips of discovery in the history of America．Never before had any white men traveled to that area．The trip Was far more dangerous than expected．The rivers were filled with rocky areas and waterfalls．Sometimes，the boats overturned or broke into pieces against big rocks．All along the way，Powell measured distances，temperatures，heights，depths and currents．He examined soils，rocks and plant life．Powell'S explorations led to the creation of US Geological Survey，which became responsible for all mapping and scientific programs of American lands．
Powell's scientific studies of western lands shaped his ideas of how those lands should be used．He suggested programs to control both crop farming and cattle raising．He Was especially concerned about water supplies．Many of his ideas were rejected at first and were not signed into law until years after his death because they were far ahead of his time．
66．Who do you think had a major influence on John Wesley Powell'S life？B
A．His mother．   
B．George Crookham．
C．His father．    
D．The teachers in Harvard and Yale．
67．John argued with his father becauseC．
A．his father refused him to leave home   
B．he wanted to go to college
C．his father wanted him to study religion
D．he wanted to work instead of study
68．The author wrote about John's experience of the civil war in order to show his following  characters exceptC．
A．his courage          B．his determination
C．his bad fortune      D．his braveness
69．What does Paragraph 3 mainly tell us？B
A．The great discovery Powell made for America．
B．The difficulties and importance of Powell's exploration．
C．The way Powell carried out his great exploration．
D．The cause of the creation of US Geological Survey．
70．From the text we can see thatD
A．Harvard University gave Powell much support for his exploration
B．John was the first American to travel to the Colorado River
C．most of Powell'S ideas were signed into law before he died
D．Powell'S explorations caused the creation of US Geological Survey．

17．As the population of the planet increases，so does the number of homes，businesses，parking lots，schools，airports and roadways．All these structures require electricity to be lighted．Humans demand these lights．They want their homes more comfortable and streets safe．The problem is that researchers have found that all this light has a negative effect on humans and wildlife as well，so please take care．
Less than 10 years ago I drove to a less populated section of my town，lay down in the middle of the road and watched an attractive meteor shower（流星雨）．The area was short of buildings and street lights．If I did that today，I wouldn't be able to see the meteor shower，but I would be surely run over by a car．
Nowadays scientists are finding light pollution can be almost as bad as CO2 Pollution．If you have ever taken a flight at night，you must remember the view of colored lights all around--it's beautiful but wasteful．How extensive this phenomenon is around the world!
Additionally，electricity needs to be created，and the process of creating that electricity will cause pollution by giving off greenhouse gases．This affects the air we breathe and our quality of life．
Apart from humans，it has been proved that wildlife is also suffering from light pollution．Thousands of birds die each year when they crash into highly lit buildings，as they are confused which direction they should go in by the light．It has been long known that tiny sea turtles become lost and follow lights on the shore instead of heading towards the sea．
Fortunately，light pollution is one of the easiest sources of pollution that can be corrected without a negative effect．We should not only pay more attention to light pollution，but also reduce light pollution by avoiding using unnecessary lighting．
56．The story given in Paragraph 2 is toD．
    A．describe the past beauty of the town
    B．show the advantage of a smaller population
    C．analyze the changes of lights in town
    D．prove the disadvantage of light pollution
57．The birds and tiny sea turtles die or get lost，becauseD．
    A．they are unable to see clearly at night
    B．their eyes are destroyed by right light
    C．electric lights prevent them from heading
    D．the light created by people misleads them
58．What would be the best title for the passage？B
    A．The Causes of Lights                B．Take care of Light pollution
    C．Ways of Reducing Light Pollution      D．The New Finding on Light．

16．"Sleep-disordered breathing"is a term for a group of conditions that can interfere with nornlal breathing while people sleep．These include snoring，mouth-breathing and sleep apnea（窒息）．Sleep-disordered breathing can do more than just leave people feeling tired the next day．It can also affect people's health．In children the effects can include behavioral and emotional problems．
In a new study．1ed by Karen Bonuck at the Einstein College of Medicine．researchers asked parents about their children's breathing from when they were babies up to about age seven．The study finds sleep-disordered breathing is associated with a fifty percent increase in outcomes including hyperactivity（多动症），aggressiveness and problems relating to other children．
Ms．Bonuck says the more serious the breathing problems，the more serious the behavioral issues were likely to be．Other studies have：linked sleep with children's behavior，but this study was extensive enough to：reject other possible causes．
How well do you sleep？A popular belief is that sleep gets worse with age．But．in another new study，those who reported the fewest problems with the quality of their sleep were people in their eighties．
Researchers did a telephone survey of American aduhs．Michael Grandner at the University of Pennsylvania medical school says the original goal was to confirm that aging is connected with increased sleep problems．The survey did find an increase during middle age，worse in women than men．But except for that，people reported that their sleep quality improved as they got older．At least they felt it did．
Mr．Grandner says．"Even if sleep among older Americans is actually worse than in younger adults，feelings about it still improve with age．"
In the study，health problems and depression were linked with poor sleep．But，based on the study．Mr．Grandner says older people who are not sick or depressed should be reporting better sleep．"If they're not．they need to talk to their doctor．"he says．He says heahtlh care providers generally dismiss sleep complaints from older adults as a normal part of aging．
66．Sleep-disordered breathing makes it hard for people to haveDwhile sleeping．
A．mouth-breathing    B．snoring    C．sleep apnea      D．normal breathing
67．Karen Bonuck thinks sleep-disordered breathing is likely to impact children'sB．
A．hobbies      B．behavior         C．study        D．diet
68．The telephone survey showed thatA．
A．older Americans'sleep quality improved with age
B．older Americans hatl better sleep than younger adults
C．people in their eighties had the most sleep problems
D．men had more sleep problems than women
69．From Mr．GraMner's words in the last paragraph we call learnB．
A．older adults with poor sleep needn't see doctors
B．we shouht not ignore sleep complaints from older adults
C．most doctors place great emphasis on older adults'poor sleep
D．sleep complaints from older adults are a normal part of aging
70．The text is mainly aboutA．
A．new findings on sleep in children，older adults
B．people's health problems
C．children's breathing problems
D．older adults'sleep complaints．