How will the war()on his generation?A、 effectB、 affectC、 impact

共用题干
A Biological Clock
Every living thing has what scientists call a biological clock that controls behavior. The bio- logical clock tells______(51)when to form flowers and when the flowers should open. It tells ______(52)when to leave the protective cocoons and fly away,and it tells animals and human beings when to eat,sleep and wake.
Events outside the plant and anima______(53)the actions of some biological clocks.Sci- entists recently found,for example,that a tiny animal changes the color of its fur______(54) the number of hours of daylight.In the short______(55)of winter,its fur becomes white.The fur becomes gray brown in color in the longer hours of daylight in summer.
Inner signals control other biological clocks.German scientists found that some kind of internal clock seems to order birds to begin their long migration______(56)twice each year. Birds ______(57)flying become restless when it is time for the trip,______(58)they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which______(59)of the brain contain biologica] clocks.An American researcher,Martin Moorhead,said a small group of cells near the front of the brain______（60)to control the timing of some of our actions.These______(61)tell a person when to______(62),when to sleep and when to seek food.Scientists say there proba- bly are other biological clock cells that control other body activities.
Dr Moorhead is studying______(63)our biological clocks affect the way we do our work .For example,most of us have great difficulty if we must often change to different work hours.
______(64)can take many days for a human body to accept the major change in work hours .Dr. Moorhead said industrial officials should have a better understanding of biological clocks and how they affect workers.He said______(65)understanding could cut sickness and accidents at work and would help increase a factory's production.

53._________
A: effect
B: affect
C: effected
D: affected

共用题干
A Powerfu Influence
There can be no doubt at all that the Internet has made a huge difference to our lives.Parents are worried that children spend too much time playing on the Internet,hardly______(51)doing anything else in their spare time .Naturally,parents are______(52)to find out why the Internet is so attractive,and they want to know if it can be______(53)for their children .Should parents worry if their children are spending that much time______(54)their computers?
Obviously,if children are bent over their computers for hours,absorbed______(55) some game,instead of doing their homework,then something is wrong. Parents and children could decide how much use the child should______(56)use of the Internet,and the child should give his or her______(57)that it won't interfere with homework.If the child is not______(58) to this arrangement,the parent can take more drastic______(59)dealing with a child's use of the Internet is not much different from______(60)any other soft of bargain about behaviour.
Any parent who is______(61)alarmed about a child's behaviour should make an appointment to______(62)the matter with a teacher. Spending time in front of the screen does not necessarily______(63)a child's performance at school.Even if a child is______(64)crazy about using the Internet,he or she is probably just______(65)through a phase,and in a few months there will be something else to worry about!

63._________
A:. effect
B: affect
C: change
D: alter

Insomnia,or"poor sleep",can have bad effects on a person′s health and general well-being.It can?21onboth our physical and mental health and can lead to other health22
Insomnia can be traced to many different reasons,but what is?23to ninny sufferers is their inability to relax fully and"switch the mind?24Constantthoughts,25?around and around in the mind,moving from one?26?tothe next,prevent stillness and peace and?27?a sufferer extremely tired.
In order to treat insomnia?28,it isfirst
necessary to allow a sufferer tore-experience?29?real
relaxation feel like.It’s almost as though they′ve forgotten how to relax.Once this hasbeen?30?by the brain,then fast and effective?31?can be made to reeducatethe unconscious towards allowing the person to relax?32?and to allow anatural state of sleep
to33
Hypnotherapy(催眠疗法)is one of the fastest and
most effective ways of?34?this goalfor long-lasting results.
Sleeping pills,if used at all,shouldonly be a short-term35as their effect is soon reduced and their side effectscan be deep and far-reaching.

第21题答案是（ ）

A.harm
B.affect
C.change
D.impact