In Britain.you be 18if you want to drive a car．( )A．canB．mustC．mayD．might 题目和参考答案——青夏教育精英家教网—

题目内容

16．In Britain，you ______ be 18if you want to drive a car．（　　）

A．

can

B．

must

C．

may

D．

might

分析在英国，如果你想开车必须18岁．

解答答案是B．本题考查情态动词must的用法．can 能够，可以；表示能力或许可；may也许，可以；表示不确定或许可；might也许，不确定；情态动词must可以表示（因为规定或法律）必须，应当；根据句意，年满18岁才可以开车应该是法律规定，故答案选B．

点评要在正确理解情态动词的基本含义的基础上，整体理解语境中的情感态度，做出合理的判断．

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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．

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

11．-I don't mind telling you what I know．
-You _____．I can manage it myself．（　　）

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

8．Just how comfortable is your sofa？Would you be prepared to let a stranger crash out there for the night？And，on the basis of a bit of email correspondence and seeing a photo of the sofa belonging to'A．N．Unknown'，would you travel halfway across the world to do the same？It might sound crazy，but this is exactly what millions of people have done whilst participating in an activity known as couch surfing．
Couch surfing is traveling on a budget，using a broad network of contacts in order to get overnight accommodation for free，or at as little cost as possible．Participants join dedicated（专业的） websites，providing as much information about themselves as possible in order to make others feel comfortable hosting them，or using them as a host．
Various safety features are generally available in such online networks，like verification of names and addresses，personal references，and'vouching for'a particular member as a reliable host or guest．
As well as the financial advantages of couch surfing，participants also claim that the practice gives them a more unique，authentic travel experience，allowing them to experience culture and cuisine through the locals，rather than from the confines of sanitized tourist accommodation．We open our minds and lives and welcome the knowledge that becomes available through cultural exchange．"Said Casey Fenton，founder of Couch Surfing．Com．"CouchSurfing wants to change not only the way we travel，but how we relate to the world．"

61．What is the right order of couch surfing？D
a．Provide personal information．
b．Travel to the host's house．
c．Join dedicated websites．
d．Check photos of sofas by ensiles．
A．d-b-a-c        B．b-c-a-d     C．a-d-c-b         D．c-a-d-b
62．Which is NOT a safety lecture of online network？B
A．Verification of identity．       B．A copy of the passport．
C．Personal references．            D．Vouching ior the member as rdioble．
63．From the text we can know thatA．
A．participants can he hosted or a host
B．couch surfing tests people's patience
C．couch surfing leads to trust between people
D．people couch surf simply for financial reasons．
64．The text mainly intends toA．
A．introduce a new way of traveling
B．teach how to keep the Internet safety
C．promote online products
D．advocate deals of saving money
65．What can he the best title of the test？C
A．Touring the World on the Interne
B．Unique Advantages of Local Traveling
C．Around the World from Sofa to Sofa
D．Cultural Exchange by Correspendence．

5．Even as Toyota CEO Akio Toyoda wrapped up a tired appearance before Congress，the head of the world's largest automaker wasn't leaving his problems behind．
Toyota faces a criminal investigation by federal lawyers in New York．The company is now being investigated．Its US dealerships in difficulty now are facing repairs to potentially millions of customer cars that have been recalled．The company is offering customers money back for rental cars and other expenses．
Its lawyers are busy preparing to cope with lawsuits．A new hearing will be conducted．And the cost to Toyota's reputation is only now starting．
Despite back-to-back hearings this  week，left to be said were a better explanation for slow actions to deal with the faults and believable promises that the problems that led to sudden，unintended accelerations will be fixed．
Toyoda said those changes were being made nearly around the clock，but during three hours of often tense questions and answers he repeated that there was no link to the vehicle's electronic systems．
Many drivers making complaints against Toyota and the government say their acceleration problems had nothing to do with floor mat interference（油门踏板故障）or sticky gas pedals（刹车）．Outside experts have suggested electronic problems．
House lawmakers expressed serious criticism on Toyoda，the grandson of the company's founder．
The National Highway Traffic Safety Administration（NHTSA）is seeking records on Toyota's recalls and is conducting its own review on whether electronics were behind the car faults．NHTSA also continues to look into steering complaints from drivers of the popular Corolla model．
Toyota has recalled 8.5million cars，more than 6million of them in the United States．
It may be a while before car buyers believe that Toyota really makes safe cars．
Toyota's January sales already fell 16percent even as most other automakers jumped back from last year's bad results．Analyst Koji Endo of Advanced Research Japan in Tokyo said he expects February sales，due out next week，to be down 30percent to 40．Toyota's sales problem could continue beyond that．
It will take some time to feel the full effect of this，he said．

66．The best title for this passage isA．
A．Toyota is in trouble    B．Toyota is under hearing
C．Toyota is finished      D．Toyota is still running
67．What is the purpose of the hearing？D
A．America hopes that Toyota apologizes to the US customers．
B．America wants to get Toyota out of the US market．
C．America wants to help Toyota out of difficulty．
D．America hopes that Toyota admits their cars have electronic system problem．
68．What can we infer from the passage？B
A．Toyota provides very good post sale service．
B．Toyota's biggest market is in the United States．
C．Toyota will be closed soon．
D．Toyota's dealership in the US will all be closed．
69．Why does Toyota recall cars and offer customers money back for rental cars and other
expenses？A
A．It tries to avoid the maximum damages to the company．
B．It is big company and has means to fix every problem．
C．It's part of post service．
D．It's a way to compete in auto market．
70．The last sentence of this passage indicatesB．
A．Analyst Koji Endo is fully confident about Toyota
B．Toyota could meet a worse situation
C．Toyota would get out of trouble sooner or later
D．Toyota would build up a better reputation among its customers．

6．My desk mate likeswhispering （私语） to me in class．

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