2.How long can human beings live?Most scientists who study old age think that the human body is (1)discovered to live no longer than 120years.However,110years is probably the longest that anyone could hope to live--if he or she is (2)completely healthy and lucky.Some scientists even say we can live as long as 130years!Yet,our cells simply cannot continue to reproduce (3)endlessly.They wear out,and as a result,we get old and (4)desperately die.
Even though we can't live forever,we are living a (5)longer life than ever before.In 1900,the average American life span (壽命) was only 47years,but today it is 75years!
When does old age begin then?Sixty-five may be out-of-date as the (6)dividingline between middle age and old age.After all,many older people don't begin to experience physical and mental (7)declineuntil after age 75.
People are living longer because more people (8)enjoy childhood.Before modern medicine changed the laws of nature,many children died of common childhood (9)problems.Now that the chances of dying (10)enjoy are much lower,the chances of living long are much higher due to better diets and health care.
On the whole,our population is getting older.The(11)changes in our population will have lasting effects on our social development and our way of life.Some people fear such changes will be for the worse,while some see(12)chances,not disaster,many men and women in their"golden years"are healthy,still active,and young in (13)mind if not in age.
As the society grows old,we need the (14)permission of our older citizens.With long lives ahead of them,they need to (15)turn active and devoted.

1.A.designedB.selectedC.improvedD.discovered
2.A.completelyB.generallyC.a(chǎn)pparentlyD.extremely
3.A.rapidlyB.harmlesslyC.endlesslyD.separately
4.A.eventuallyB.hopelesslyC.a(chǎn)utomaticallyD.desperately
5.A.busierB.longerC.richerD.happier
6.A.finishingB.guidingC.waitingD.dividing
7.A.stressB.damageC.declineD.failure
8.A.surviveB.enjoyC.rememberD.value
9.A.problemsB.fearsC.worriesD.diseases
10.A.poorB.youngC.sickD.quiet
11.A.changesB.recoveryC.safetyD.increases
12.A.dreamsB.chancesC.strengthsD.choices
13.A.mindB.a(chǎn)ppearanceC.voiceD.movement
14.A.protectionB.suggestionsC.contributionsD.permission
15.A.soundB.a(chǎn)ppearC.turnD.stay.

分析 本文是一篇說明文.話題圍繞人類的壽命展開.人的壽命是有限的,隨著社會的發(fā)展,生活水平的提高,人們的壽命比以前更長了,而且老齡化已經(jīng)成了社會的一個趨勢,我們的社會需要這些老年人們繼續(xù)保持積極的心態(tài),為社會做貢獻(xiàn).

解答 1.A   考查動詞辨析  根據(jù)句意可知,科學(xué)家們認(rèn)為人體的結(jié)構(gòu)設(shè)計決定了人類最多不會活過120歲.故選A.
2.D   考查副詞辨析   根據(jù)上下文可知,此處表示110歲很可能是任何一個人可能會希望活的最長的年齡---如果一個人非常的健康和幸運(yùn),人們希望能活到110歲,故選D.
3.C   考查副詞辨析   根據(jù)句意可知,這里表示人類細(xì)胞不能永遠(yuǎn)無止境地自我繁殖,所以人才會變老.故選C.
4.A   考查副詞辨析    根據(jù)語境可知,get old 的最終結(jié)果就是死亡,所以用eventually表示"最終".故選A.
5.B   考查形容詞比較級辨析   根據(jù)上下文的語境可知,美國人的平均壽命從47歲增長到75歲,B項符合語境,故選B.
6.D   考查形容詞辨析.根據(jù)句意可知,把65歲當(dāng)做中年和老年的分界線,這已經(jīng)不適合現(xiàn)在的形勢了.dividing line分界線,故選D.
7.C   考查名詞辨析.根據(jù)上文提到的65歲作為中年和老年的分界線已經(jīng)過時了,再結(jié)合空后的"until after age 75"可知,現(xiàn)在很多老年人是在75歲之后身體和精神才開始衰弱的,故選C.
8.A   考查動詞辨析.根據(jù)這一段的內(nèi)容和the chances of living long are much higher due to a better diets and health care可知,現(xiàn)在的人平均壽命比以前更長的一個原因是人們從童年的疾病中幸存了下來,故選A.
9.D   考查名詞辨析.根據(jù)上文的"modern medicine"可知,此處選disease符合語境,故選D.
10.B  考查形容詞辨析.句意:既然年少夭折的可能性更低了,那么活得更長的機(jī)會就更高了,因為有了更好的飲食和醫(yī)學(xué)護(hù)理.poor 窮的;young 年輕的;sick 病的;quiet 安靜的.根據(jù)這一段的意思可知,以前人們在小的時候就因為生病死去了,dying young就是年少死去.故選B.
11.A  考查名詞辨析.根據(jù)下文中Some people fear such changes will…可知,我們現(xiàn)在的人口結(jié)構(gòu)改變了,故選A.
12.B  考查名詞辨析.根據(jù)句意可知,這句話中的while 表示對比,即跟前一種人不一樣的看法,故選B.
13.A  考查名詞辨析.句意:現(xiàn)在,很多處在"黃金年齡"的男士和女士,身體都非常健康,仍然積極,心態(tài)也很年輕.mind 心態(tài);appearance 外表;voice 聲音;movement移動.根據(jù)句意可知,這里應(yīng)該是說雖然年齡老了,但是心態(tài)依然年輕,故選A.
14.C  考查名詞辨析.句意:隨著我們的社會老齡化,我們需要這些老年公民們的貢獻(xiàn).protection 保護(hù);suggestions 建議;contributions 貢獻(xiàn);permission允許.根據(jù)文意可知,現(xiàn)在的社會逐漸老齡化,因此老年人也要繼續(xù)給我們的社會做貢獻(xiàn),故選C.
15.D  考查動詞辨析.句意:前面還有很長的壽命,他們需要保持積極的心態(tài)和奉獻(xiàn)的精神.sound 聽起來;appear 好像;出現(xiàn);turn 轉(zhuǎn),變成;stay保持.根據(jù)文意可知,現(xiàn)在人們的壽命更長了,因此老年人也要繼續(xù)保持積極心態(tài),為我們的社會做貢獻(xiàn).故應(yīng)選D.

點評 解答此類題目可遵循以下步驟:第一步,通讀全文,了解文章大意,獲得整體印象,同時初選出一批較有把握的答案.第二步,邊核對初選答案邊補(bǔ)填留下的空格.如果短文難度較大,則可復(fù)讀幾遍,核對和確定答案.有些空一時決定不了,可作個記號,待復(fù)查時再確定. 第三步,復(fù)查定稿.從整體理解角度出發(fā),仔細(xì)審核答案,確保意義上、語法上沒有錯誤,同時對遺留下來的少數(shù)幾個空格作最后選擇.

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