2．I was walking down a dark street one evening______I heard screams coming from　behind the bushes．（　�。�
A．whenB．beforeC．untilD．while

分析 一天晚上我正走在黑暗的大街上，突然我聽到從灌木叢后面?zhèn)鞒龅募饨新暎?/p>

解答 答案A．
when"在…時(shí)候"；before"在…之前；才…"；until"直到"；while表示"當(dāng)…的時(shí)候"．這四個(gè)詞都可以引導(dǎo)時(shí)間狀語從句，但是只有when可以用于"be　doing　sth．when…"結(jié)構(gòu)中，表示"正在做某事突然…"，故答案選A．

點(diǎn)評(píng) 本題考查從屬連詞的用法．連詞的用法辨析，要注意分析主從句之間的邏輯關(guān)系，再確定相應(yīng)的連詞，同時(shí)注意不同的連詞的語義及用法區(qū)別．

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：閱讀理解

4．The Process of Ageing
At the age of twelve years，the human body is at its most vigorous．It has yet to reach its full size and strength，and its owner his or her full intelligence； but at this age the possibility of death is least．Earlier，we were infants and young children，and consequently more vulnerable （易受傷的）； later，we shall undergo a progressive loss of our vigour and resistance which，though vague at first，will finally become so steep that we can live no longer，however well we look after ourselves，and however well society，and our doctors，look after us．
This decline in vigour with the passing of time is called ageing．It is one of the most unpleasant discoveries which we all make that we must decline in this way，that if we escape wars，accidents and disease we shall eventually"die of old age"，and that this happens at a rate which differs little from person to person，so that there are heavy odds in favor of our dying between the ages of sixty-five and eighty．Some of us will die sooner，a few will live longer----on into a ninth or tenth decade．But the chances are against it，and there is a virtual limit on how long we can hope to remain alive，however lucky and physically strong we are．
Normal people tend to forget this process unless and until they are reminded of it．We are so familiar with the fact that man ages，that people have for years assumed that the process of losing vigour with time，of becoming more likely to die the older we get，was something self-evident，like the cooling of a hot kettle or the wearing-out of a pair of shoes．They have also assumed that all animals，and probably other organisms such as trees，or even the universe itself，must in the nature of things"wear out"．
Most animals we commonly observe do in fact age as we do，if given the chance to live long enough； and mechanical systems like a wound （上發(fā)條的） watch，or the sun，do in fact an out of energy in accordance with the second law of thermodynamics （熱力學(xué)）．But these are not similar or equivalent to what happens when man ages．A run-down watch is still a watch and can be rewound．An old watch，by contrast，becomes so worn and unreliable that it eventually is not worth mending．But a watch could never repair itself-it does not consist of living parts，only of metal，which wears away by friction （摩擦）．We could，at one time，repair ourselves-well enough，at least，to overcome all but the most instantly fatal illnesses and accidents．Between twelve and eighty years we gradually lose this power，an illness which at twelve would knock us over，at eighty can knock us out，and into our grave．If we could stay as vigorous as we are at twelve，it would take about 700 years for half of us to die，and another 700 for the survivors to be reduced by half again．
74．What can be learned from this passage is thatD．
A．people usually are unhappy when they are reminded of ageing
B．children reach their full intelligence at the age of twelve years
C．people are usually more likely to die at the age of twelve years
D．our first twelve years represent the peak of human development
75．The underlined word"it"in the last sentence of Paragraph Two refers toC．
A．remaining alive until 65                B．dying before 65 or after 80
C．remaining alive after 80                D．dying between 65 and 80
76．What does"ageing"mean according to the passage？B
A．It is a fact that people cannot live any longer．
B．It refers to a gradual loss of vigor and resistance．
C．It is usually a phenomenon of dying at an old age．
D．It is a period when people are easily attacked by illness．
77．What do the examples of the watch refer to in the last paragraph？D
A．Normally people are quite familiar with the ageing process．
B．The law of thermodynamics functions in the ageing process．
C．All animals and other organisms undergo the ageing process．
D．Human's ageing process is different from that of mechanisms．

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

11．-It's a pity that I didn't get that job．
-Don't worry．Something better will       ．（　�。�
A．come alongB．wake onC．go byD．put forward

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

10．_______ environmental damage is done，it takes many years for the ecosystem to recover．（　　）
A．Even ifB．If onlyC．WhileD．Once

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

17．You may keep the book a further week _____ no one else requires it．（　�。�
A．beforeB．untilC．ifD．unless

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

7．-It cost me 20 yuan to get to the Quanzhou Museum yesterday．
-Well，it was a waste of money to take a taxi __________ you could have gone by bus as well．（　�。�
A．whenB．whileC．unlessD．because

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

14．______ more and more people may turn to the Internet for the latest news，it is unlikely that the newspaper will disappear．（　　）
A．WhenB．BecauseC．SinceD．While

查看答案和解析>>

科目：高中英語 來源： 題型：填空題

17．Dr．Kate：Radio（61）has changed（change） a lot since we were young．It used（62）tobe the major source of'fun for the family．
Bob：Nowadays when you turn on the radio，you either hear music，a talk show（63）ornews．
Dr．Kate：（64）Fortunately（Fortunate），you can choose the kind of music you want to hear．
Bob：Yes，and there is a lot of points of view when you listen to talk shows．I usu-
          ally enjoy （65）listening（listen） to them．I particularly like it w-hen a caller disagrees
          with the talk show host．I like to hear how he will defend his ideas．
Dr．Kate：Some talk show hosts are very rude to those（66）whohave opposing ideas．I really find that terrible．
Bob：It seems that people only listen to the radio（67）while/whenthey are driving in their car，
Dr．Kate：That is true for me．but I know that my husband listens to it while he is
working （68）at home．
Bob：Now that f think about it，I realize that a lot of stores have the radi （69）playing（play）．
Dr．Kate：It's still a usefully and pleasant form of  （70）communication（communicate）．

查看答案和解析>>

科目：高中英語 來源： 題型：選擇題

18．In recent years，_   __global warming is becoming__     _concern for people all over the world．（　�。�
A．the； theB．不填；不填C．不填；aD．the； 不填

查看答案和解析>>

同步練習(xí)冊(cè)答案