you will carry out my instructions or I will offer the job to someone else．( )A．EitherB．UnlessC．UntilD．Whether 题目和参考答案——青夏教育精英家教网—

题目内容

12．______ you will carry out my instructions or I will offer the job to someone else．（　　）

A．

Either

B．

Unless

C．

Until

D．

Whether

分析要么你按照我的指示来做要么我把工作给你其他人来做．

解答答案：A
根据句意可知，考查固定短语"either…or…"意为"要么…要么…"．意为"要么你按照我的指示，要么我把工作给其他人"．"Unless"意为"除非"，"Until"意为"直到…"，"Whether"意为"是否"．

点评考查连接词，难度不大．考生需掌握这几个连接词的意思并能结合具体语境使用．

练习册系列答案

3．Many of us mistakenly believe that it's wrong to think we have any good qualities．We may spend a lot of time blaming ourselves for our negative qualities，thinking that self criticism is the key to improving our performance．However，a constant focus on our supposed shortcomings can stop our efforts to make friends with other people．How can we believe that others could like us if we believe our inner being is flawed（有缺陷）？
If someone seems to dislike you，the reason for that dislike might have little or nothing to do with you．The person who doesn't like you might be fearful，or shallow，or busy or shy．Perhaps you and that person are simply a mismatch for each other at this particular time．
Don't take yourself out of the game by deciding that your flaws are bigger than your good qualities．In fact，some of the very qualities you consider to be flaws may be irresistible to someone else．For all the factors that might cause one person to reject you，there are at least as many factors that will work in your favor with someone else．
You might be thirty pounds over your ideal weight，but you may have a wonderful laugh and a real enthusiasm for life．There are many people who don't mind your extra pounds．You may drive a shabby car，but you might be a great dancer and a loyal friend．There are people out there looking for loyalty，or fun，or sweetness，or wisdom，and the package it comes in is not important．If you are worried that you are not beautiful enough to attract friends，keep in mind that not everyone is looking for physical beauty in their friends．You can decide to feel inferior（自卑） because you don't have much money and you don't drive a nice car．You can believe that this is the reason that you don't have many friends in your life．On the other hand，if you are very wealthy you may be suspicious that everyone is after your money and that nobody really likes you as a person．
The point is that you can focus on just about anything and believe it's the reason you do not have friends and cannot make any．

36．According to the authorD plays an important role in making friends．
A．admitting your shortcomings B．self criticism C．modesty D．confidence
37．If you are not liked by a person，C．
A．you should find the reason in yourself
B．you'd better talk with the person face to face
C．you may not be the one to be blamed
D．you and that person misunderstand each other
38．We can learn from the third paragraph thatB．
A．your good qualities may turn out to be your flaws
B．your weakness may also be your strengths in some way
C．your negative qualities cause a person to reject you
D．you'll have few friends if your flaws are bigger than your good qualities
39．Which of the following is true according to the author？C
A．It is important to lose weight．
B．It is easier for a wealthy person to make friends．
C．Inner qualities are more important than physical appearance．
D．If you are not beautiful enough，try to improve your physical beauty．
40．What do you think the author is most likely to suggest if he continues to write？A
A．How to find your good qualities．
B．How to make friends．
C．How to make self criticism．
D．How to lose weight．

20．Seeing in Stereo
Have you wondered why you have two eyes and why they are set close together on the front of your face？The reasons are simple and important to the way you see the rest of your world．
Your eyes are like two small cameras．A camera catches an image（影像）of an object and records it on film．Similarly，when you look at something，each eye takes in what it sees and sends this image to the back of the eyeball．Because your eyes are set close together，they view the world from about the same height but from slightly different angles．Working as a team，the eyes send the images to your brain，which puts them together into a single，centered image．
Seeing in stereo means seeing with two eyes working together，which is called stereoscopic sight．This allows you to view the world in three dimensions，or 3-D．Seeing depth helps you to judge the distance between you and the objeets you see and to adjust to the changing angle at which you see something as you move closer to or farther away from it．If images are coming from only one eye，however，only two of these dimensions-height and width-can be perceived．A world seen with one eye is thus two-dimensional，as in a photograph．
Now consider why your two eyes are on the front of your face．Think of other animals with this same arrangement．They are all animals that hunt，like lions and wolves．Their eyes face directly in front of them．This provides a field of sight about 180degrees wide，which is called binocular sight．On the other hand，animals that are hunted have eyes on the sides of the head，which  Drovides nearly 360-degree field of sight．In order to stay alive，they need to see things coming from the sides and from behind．However，without stereoscopic sight，they have difficulty determining how far a danger is．
With sight both stereoscopic and binocular，humans share with animal hunters the ability to  see from side to side and to accurately determine the distance．If you think it would be great to  have another type of sight，perhaps with hundreds of tiny eyes like many insects do，think again!Each tinv insect eye sees only a tiny part．Besides，what if you needed glasses？Be glad for the  eyesight that you have．

67．According to the passage，an eye is like a camera because bothA
A．can record images           B．can imagine objects
C．provide centered images     D．work at the same height
68．Stereoscopic sight is a result of havingC
A．a three-hundred-sixty-degree field of sight
B．hundreds of eyes，all seeing parts of an image
C．two eyes close to one another that work together
D．one eye on either side of the head，each seeing a different image
69．The underlined word"perceived''in Paragraph 3meansC
A．set    B．taken    C．seen    D．understood
70．The author implies that"seeing in stereo"B
A．is similar to the way cameras work
B．is an ability humans are fortunate to have
C．would be better for a wider field of sight
D．helps people to havelbetter sight than animals．

7．Running on Empty
For almost a century，scientists have assumed，tiredness-or exhaustion-in athletes originates in the muscles（肌肉）．Precise explanations have varied，but all have been based on the"Limitations Theory"．In other words，muscles tire because they hit a physical limit； they either run out of fuel or oxygen or they drown in harmful by-products （副产品）．
In the past few years，however，Timothy Noakes from the University of Cape Town． South Africa，has examined this standard theory．Tiredness，he argues，is caused not by signals springing from overtaxed muscles，but is an emotional response which begins in the brain．The fundamental nature of his new theory is that the brain paces the muscles to keep them well back from the edge of exhaustion．When the brain decides it's time to quit，it creates unbearable muscle tiredness．This"Central Governor"theory remains controversial，but it does-explain many puzzling aspects of athletic performance．
A recent discovery that Noakes calls the"lactic acid paradox"made him start researching this area seriously．Lactic acid is a by-product of exercise，and the increase of it is often mentioned as a cause of tiredness．But when research subjects exercise in certain conditions created artificially，they become tired even though lactic acid levels remain low．
Nor has the oxygen content of their blood fallen too low for them to keep going．Obviously，something else was making them tire before they hit either of these physiological limits． Noakes conducted an experiment with seven cyclists．It has long been known that during exercise，the body never uses 100% of the available muscle fibres （纤维）．The amount used varies； but in some tasks such as this cycling test the body calls on about 30%．His team found that as tiredness set in，the electrical activity in cyclist's legs declined-even when they were making a great effort to cycle as fast as they could．
To Noakes，this was strong evidence that the old theory was wrong．"The cyclists may have felt completely exhausted，"he says，"but their bodies actually had considerable reserves that they could theoretically tap by using a greater amount of the resting fibres．"
This，he believes； is the proof that the brain is regulating the pace of the workout to hold the well back from the point of extreme tiredness．
67，Which of the following is supported by the"Limitations Theory"？B
A．Tiredness is caused by signals from brain．
B．Athletes feel tired when they use up all their energy．
C．The body uses 100% of the muscle fibres in exercise．
D．Athletes become tired though lactic acid levels remain low．
68．Noakes has found out that．C
A．muscle fibres control athletes'movements
B．lactic acid levels remain high in cycling test
C．mental processes control the symptoms of tiredness
D．different exercises use different amount of muscle fibres
69．It is likely that both theories accept that．A
A．lactic acid is produced in muscles during exercise
B．the oxygen content in blood may rise after sports
C．tiredness is a harmful by-product of exercise
D．the energy in human bodies can be
70．What is Paragraph 3mainly about？C
A．The description of a new test．
B．The explanation of the theory．
C．The puzzling evidence of a study．
D．The whole process of the research．

17．A left-luggage office is a place where bags ________ be left for a short time，especially at a railway station．（　　）

4．May I watch TV for another 15minutes，Mum？
Oh，dear，if you _____．（　　）

1．John _______ such a thing about you．He never speaks ill of you behind your back..（　　）

	A．	can't have said		B．	might not have said
	C．	couldn't say		D．	mustn't have said

2．Before 1840architects and builders made buildings from stone，brick，or wood．The outside walls held up the weight of the building．A building that had more than a few stories became very heavy．A tall building，such as a castle，had very thick walls．
As time went by，architecture began to change．By 1850builders had begun to use a metal called iron for the fronts of some large buildings．Iron is lighter than stone and stronger than wood．People dig raw iron from the ground，but raw iron is not enough to use in buildings．Builders must use another type of iron called an alloy．
An alloy is a metal that contains different metals and other compounds，or mixtures of chemicals．The metals and compounds are melted and mixed together to form the alloy．To make an iron alloy，workers use a blast furnace．This machine creates great heat．It has a tall chamber that is lined with brick and open at the top．Workers put limestone，raw iron，and coke （a substance made from coal） into the top of the furnace．They force hot air into the bottom of the furnace．The hot air and a chemical reaction turn the materials into a liquid mass．Workers pour off waste liquid，called slag，and save the iron．Then they form the hot iron into large blocks called pigs，which can be formed into objects．This formed iron is called cast iron．
Cast iron is strong，but it still contains unwanted materials．People wanted to remove these impurities．To do this，they needed to heat the iron to very high temperature．Blast furnaces could not make that much heat．
In England in 1855，Sir Henry Bessemer found the solution．He forced air through liquid pig iron．The oxygen in the air mixed with the impurities in the iron in a process called oxidation．Oxidation creates heat．The heat turns impurities into slag，which is poured off so that only pure steel remains．Pure steel is much stronger than iron．The Bessemer process took place in an egg-shaped machine called a converter．With this process，workers began to make large amounts of steel quickly and cheaply．
By the late 1800s，many people lived in big cities．The price of land increased，one way builders could lower costs was to build taller buildings，which used less land．In Chicago in 1889，George A．Fuller completed the Tacoma Buildings，which had steel beams to hold up its weight．Soon people built more tall buildings with 10to 20stories．These were the first skyscrapers．

50．Alloys are important because theyC．
A．have no impurities
B．are the raw materials that people use to make iron
C．may be more useful than the separate metals in the alloy
D．contain different metals
51．The Bessemer process was a success because it producedB．
A．iron from steel
B．steel quickly and cheaply
C．less slag than a blast furnace
D．impurities in the iron
52．Sir Henry Bessemer probablyD．
A．avoided difficult problems
B．created slag into pure steel
C．was not familiar with metals such as steel
D．knew how to make cast iron
53．From the article，you can conclude that architects throughout historyA．
A．thought carefully about materials when they designed buildings
B．could not design creative buildings until steel was invented
C．disliked stone，brick，and wood
D．liked to design tall buildings
54．Which of the statements below expresses the main idea of the article？A
A．Discoveries about iron and steel have allowed people to build taller buildings．
B．Sir Henry Bessemer developed a process to make steel．
C．Architects use many kinds of materials in buildings．
D．Changes about designing building．

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