题目内容

　

The factory produces half a million pairs of shoes every year, 80％ ________ are sold abroad.

[　　]

A．of which
B．which of
C．of them
D．of that
答案：
解析：

80％ of which引导定语从句，C项不能引导定语从句，D项中that错误。


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完形填空

　　The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class．In the past 15 years, 　　1　　 have reported well over 100 　　2　　 that could have been caused by electromagnetic interference．The 　　3　　 of this interference remains unconfirmed, 　　4　　 increasingly, experts are pointing the blame at portable electronic devices such as portable computers, radios and cassette players and mobile telephones．

　　RTCA, an organization which 　　5　　 the aviation industry, has recommended that 　　6　　 airlines ban such electronic devices from being used 　　7　　 “critical” stages of flight, 　　8　　 take-off and landing．Some experts have gone further, 　　9　　 for a total ban during all flights．Currently, rules on using these devices are 　　10　　 up to individual airlines．And although some airlines prohibit passengers from 　　11　　 such equipment during take-off and landing, most are reluctant to enforce a total ban．Many passengers want to work during flights．

　　The 　　12　　 is predicting how electromagnetic fields 　　13　　 affect an aircraft’s computers．Experts 　　14　　 that portable devices emit radiation, which affects those wavelengths which 　　15　　 use for navigation and communication．But, they have not been able to 　　16　　 these effects in a laboratory, they have no 　　17　　 of knowing whether the interference might be 　　18　　 or not．

　　The fact that aircraft may be vulnerable(易受攻击)to interference 　　19　　 the risk that terrorist may use radio system in order to 　　20　　 navigation equipment．

(1)
[　　]

A．

drivers

B．

conductors

C．

engineers

D．

pilots

(2)
[　　]

A．

actions

B．

events

C．

incidents

D．

matters

(3)
[　　]

A．

reason

B．

effect

C．

source

D．

story

(4)
[　　]

A．

and

B．

for

C．

but

D．

so

(5)
[　　]

A．

ensures

B．

persuades

C．

advises

D．

warns

(6)
[　　]

A．

some

B．

all

C．

several

D．

no

(7)
[　　]

A．

for

B．

with

C．

by

D．

during

(8)
[　　]

A．

particularly

B．

specially

C．

unfortunately

D．

possibly

(9)
[　　]

A．

calling

B．

looking

C．

waiting

D．

asking

(10)
[　　]

A．

put

B．

left

C．

given

D．

sent

(11)
[　　]

A．

carrying

B．

taking

C．

using

D．

fixing

(12)
[　　]

A．

possibility

B．

difficulty

C．

necessity

D．

idea

(13)
[　　]

A．

must

B．

should

C．

need

D．

might

(14)
[　　]

A．

know

B．

tell

C．

guess

D．

think

(15)
[　　]

A．

aircraft

B．

trains

C．

ships

D．

cars

(16)
[　　]

A．

restudy

B．

retell

C．

reproduce

D．

renew

(17)
[　　]

A．

key

B．

way

C．

step

D．

trick

(18)
[　　]

A．

dangerous

B．

strong

C．

helpful

D．

useful

(19)
[　　]

A．

faces

B．

runs

C．

raises

D．

take

(20)
[　　]

A．

damage

B．

guide

C．

lead

D．

repair

完形填空

　　I was standing on stage before 200 people, dressed up as George Washington．I had the lead role in my sixth grade 　　1　　 and, for the past two months, I had walked back and forth in my room 　　2　　 to say my lines．

　　Now it was time to give a 　　3　　, and my heart was beating rapidly．At my 　　4　　, I began to speak smoothly and clearly, but then it 　　5　　：I stuttered(口吃)．I knew I would, and I did．

　　From that moment on, I 　　6　　 that my role in that play would be my first and my last．My speech problem affected 　　7　　．

　　As a child, I struggled to say a full sentence, repeatedly hearing the 　　8　　 comments of my parents．“Take a deep breath and think about what you’re going to say．” I was too 　　9　　 to admit I had a problem．

　　　　10　　 my school career progressed my speech problem became less noticeable, but it never 　　11　　．It held me back．

　　After realizing that class officers had to speak in front of the entire student body, I 　　12　　 running in class elections．I feared reading aloud and meeting new people．

　　I would 　　13　　 sit in my room and cry, imagining what it would be like to be 　　14　　, like everyone else．

　　Finally, I came to my senses．I read articles about famous people who 　　15　　　their speech problems．I 　　16　　 the fact that I do have a problem that will always be with me．

　　It has made me a 　　17　　 person and, with time, I know I’ll gain the confidence to stand up and 　　18　　 to myself that it will never hold me back．　　19　　, I know that I’m not the only one who 　　20　　, because nobody is perfect．

(1)
[　　]

A．

play

B．

game

C．

dance

D．

concert

(2)
[　　]

A．

desiring

B．

waiting

C．

struggling

D．

hesitating

(3)
[　　]

A．

test

B．

performance

C．

suggestion

D．

judgment

(4)
[　　]

A．

sight

B．

angle

C．

news

D．

turn

(5)
[　　]

A．

happened

B．

seemed

C．

became

D．

remained

(6)
[　　]

A．

urged

B．

promised

C．

admitted

D．

repeated

(7)
[　　]

A．

nothing

B．

something

C．

everything

D．

anything

(8)
[　　]

A．

exciting

B．

surprising

C．

puzzling

D．

annoying

(9)
[　　]

A．

ashamed

B．

willing

C．

weak

D．

eager

(10)
[　　]

A．

Though

B．

As

C．

Before

D．

Unless

(11)
[　　]

A．

failed

B．

disappeared

C．

burst

D．

combined

(12)
[　　]

A．

insisted on

B．

put off

C．

approved of

D．

gave up

(13)
[　　]

A．

never

B．

seldom

C．

sometimes

D．

constantly

(14)
[　　]

A．

normal

B．

special

C．

usual

D．

alive

(15)
[　　]

A．

realized

B．

refused

C．

overcame

D．

avoided

(16)
[　　]

A．

doubted

B．

changed

C．

hid

D．

faced

(17)
[　　]

A．

stronger

B．

greater

C．

wiser

D．

purer

(18)
[　　]

A．

explain

B．

prove

C．

respond

D．

scream

(19)
[　　]

A．

On the contrary

B．

By the way

C．

Above all

D．

At most

(20)
[　　]

A．

attempts

B．

argues

C．

suffers

D．

risks

　　 The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.

　　A. what B. which C. that D. though

You hear the same complaint all the time: “My memory is terrible.” Is it all in the mind, or do real changes take place in the brain with the passing of time? The answer is that the brain’s cells decline and die with age. However, according to Professor Arthur Shimamura of the University of California, people vary greatly in how they change mentally with age, as well as how much their mental ability declines.

　　There are three main ways in which mental function changes. The first concerns speed, such as how quickly you can react to fast-moving incidents on the road. Drivers in their late teens react quickly but often drive too fast, while the over -60’s are more careful but react more slowly. This type of mental slowing results from a reduction in the efficiency with which the brains’ neurons (神经细胞) work.

　　The fact that adults find it harder to learn musical instrument than children points to a second type of mental decline, the loss of learning ability with age. The part of the brain which is known to control new learning is particularly sensitive to the effects of ageing. This means we have to depend more on diaries and other mental aids as we get older, take longer to learn a new language and are slower to master new things at work.

　　“Working memory” is the third brain function that is sensitive to the effects of ageing. Absentmindedness occurs at all ages because of imperfections in the working memory system. For example, you may continually lose your glasses, or find yourself walking into a room of your house only to find that you cannot remember what you came for. Such absent-mindedness also occurs more often as we get older.

　　However, evidence also shows that the principle “use it or lose it” applies to the ageing brain. Professor Shimamura studied a group of university professors who were still mentally active, and compared their performance on neuropsychological tests with that of others of their age group, as well as with younger people. He found that on several tests of memory, the mentally active professors in their 60’s and early 70’s performed better than those of the same age, and as well as the younger group.

 

73. Why does memory get worse as people grow older? (回答词数不超过9个单词)

74. In which ways does mental function change? (回答词数不超过6个单词)

75. What can we conclude from Shimamura’s test on the professors? (回答词数不超过6个单词)

The secret of her success may 　　 the fact that she knows when to study and when to play.

A. lie in

B. result in

C. take in

D. fill in

 

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