题目内容
We have dresses of various styles and patterns on sale and you may take ______ suits you best.
A.whatever | B.whichever | C.no matter what | D.no matter which |
B
解析试题分析:句意:我们有各种各样的款式的裙子出售,你总可以找到一件适合你的。whichever无论哪一个,引导名词性从句,本句中引导宾语从句,故选B
考点:名词性从句
点评:名词性从句属于比较简单的语法点,学生应在平时掌握好细节部分。值得注意的是no matter+疑问词,只可以用于引导让步状语从句,whatever/whichever等这类词既可以引导让步状语从句也可以引导名词性从句。

Like distance runners on a measured course,all of us will move through time in a roughly predictable pattern.
In the first stage of our lives,we develop and grow, reaching toward the top of physical vitality(活力).
After we grow up,however, the body begins a process of gradually wearing out.
A new awareness of physical fitness may help lengthen our years of health and vitality,yet nothing we do will work to stop the unavoidable force of aging.
Most of the changes of aging take place deep inside the body.The lungs become less able to take in oxygen.Powerful muscles gradually lose their strength.The heart loses power and pumps less blood.Bones grow easier to break.
Finally, we meet a stress,a stress that is greater than our physical resistance.Often,it is only a minor accident or chance infection(a disease caused by virus),but this time,it brings life to an end.
In 1932,a classic experiment nearly doubled the lifetime of rats,simply by cutting back the calories in their diet The reason for the effect was then unknown.
Today, at the University of California at Berkley, Dr.Paul Seagle has also greatly lengthened the normal lifetime of rats.The result was achieved through a special protein limited diet,which had a great effect on the chemistry of the brain.Seagle showed that within the brain,specific chemicals control many of the signals that influence aging.By changing that chemical balance,the clock of aging can be reset.
For the first time, the mystery of why we age is being seriously challenged.Scientists in many fields are now making striking and far-reaching discoveries.
An average lifetime lasts 75 years,yet in each of us lies a potential for a longer life.If we could keep the vitality and resistance to disease that we have at age twenty, we would live for 800 years.
【小题1】What does the underlined word “it” refer to?
A.Physical vitality. | B.Stress. | C.Aging. | D.Physical resistance. |
A.People gradually lose their muscle strength. |
B.Bones tend to break more easily. |
C.The heart loses power and pumps less blood. |
D.The lungs become unable to take in oxygen.zxxk |
A.human's life pattern is predictable |
B.physical fitness can't stop the force of aging |
C.human's lifetime will last longer than 75 years |
D.all of the changes of aging take place deep inside the body |
A.By keeping their physical fitness. | B.By cutting the calories in their diet. |
C.By resetting their clock of aging. | D.By limiting the protein in their diet. |
A.Two Great Experiments |
B.The Mystery of Human Life |
C.The Breakthrough in the Study of Aging |
D.Ways to lengthen Human Life |
American society is not nap (午睡)friendly . In fact , says David Dings , sleep specialist at the University of Pennsylvania School of Medicine , “There’s even a prohibition (禁止) against admitting we need sleep”. Nobody wants to be caught napping or found asleep at work . To quote a proverb : “Some sleep five hours , nature requires seven , laziness nine and wickedness(淘气的) eleven.”
The way not to fall asleep at work is to take naps when you need them . “We have to totally change our attitude toward napping ,” says Dr. William Dement of Stanford University , the godfather of sleep research .
Last year a national commission led by Dement identified(发现) an “American sleep debt” which one member said was as important as the national debt . The commission was concerned about the dangers of sleepiness : people causing industrial accidents or falling asleep while driving . This may be why we have a new sleep policy in the White House . According to recent reports , President Clinton is trying to take a half---hour snooze (瞌睡) every afternoon .
About 60 percent of American adults nap when given the opportunity . We seem to have “a mid afternoon quiet phase ,” also called “a secondary sleep gate .” Sleeping 15 minutes to two hours in the early afternoon can reduce stress and make us refreshed . Clearly , we were born to nap .
We superstars of snooze don’t nap to replace lost shut--eye or to prepare for a night shift . Rather , we “snack” on sleep ,whenever , wherever and at whatever time we feel like it . I myself have napped in buses , cars , planes and on boats ; on floors and beds ;and in libraries , offices and museums .
【小题1】The research done by the Dement Commission shows that Americans .
A.don’t like to take naps |
B.are terribly worried about their national debt |
C.think that lack of enough sleep causes many accidents |
D.have caused many industrial and traffic accidents |
- warn us of the wickedness of napping
C. discuss the side effects of napping
D. convince the reader of the necessity of napping
【小题3】The “American sleep debt”(Line 1 , Para .3) is the result of .
- the traditional misconception the Americans have about sleep
- the new sleep policy of the Clinton Administration
- the rapid development of American industry
- the Americans’ worry about the danger of sleepiness
- preferable to have a sound sleep before a night shift
- good practice to eat something light before we go to bed
- essential (基本的) to make up for lost sleep
- natural to take a nap whenever we feel the need for it