题目内容
完形填空(共20小题;每小题1.5分,满分30分)阅读下面短文,掌握其大意,然后从1—20题各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。
Throughout history man has had to accept the fact that all living things must die. But people now live longer than they 1 . Yet, all living things still show the 2 of aging, which will eventually 3 death.
Aging is not a disease, but as a person passes maturity (成熟期), the cells of the body and the 4 they form do not function as well as they 5 in childhood and teenage years. The body provides less 6 against disease and is more 7 to have accident.
A number of related causes may 8 aging. Some cells of the body have a fairly long life, but they are not 9 when they die. As a person ages, 10 of brain cells and muscle cells decreases. 11 body cells die and are replaced by new cells. In an aging person the 12 cells may not be as workable or as capable 13 growth as those of a young person.
Another 14 in aging may be changes within the cells 15 . Some of the protein chemicals in cells are known 16 with age and become less elastic (有弹性的). This is why the skin of old people wrinkles (皱纹) and 17 . This is also the reason why old people 18 in height. There may be other more important chemical changes in the cells. Some complex cell chemicals, such as DNA and RNA, store and 19 information that the cells need. Aging may affect this 20 and change the information-carrying molecules so that they do not transmit the information as well.
1. A.would B.be used to C.used to D. used
2. A.function B.effect C.affect D. sign
3. A.lead in B.give in C.run into D. result in
4. A.hands B.feet C.heart D. organs
5. A.do B.has done C.did D. had done
6. A.energy B.protection C.vigor D. power
7. A.likely B.probable C.possible D. alike
8. A.attend to B.contribute to C.add to D. devote to
9. A.replaced B.reborn C.recovered D. surrendered
10. A.a number B.the amount C.the number D. a great deal
11. A.The others B.The other C.Another D. Other
12. A.old B.left C.new D. other
13. A.to B.for C.of D. in
14. A.factor B.effect C.reason D. element
15. A.for themselves B.of themselves C.themselves D. on their own
16. A.change B.to have changed C.to change D. to be changed
17. A.hangs loose B.hangs loosely C.is hanging loosely D. is hanging loose
18. A.increase B.shrink C.lengthen D. decrease
19. A.pass away B.pass by C.pass off D. pass on
20. A.improvement B.procession C.approach D. process
1. C
2. B
3. D
4. D
5. C
6. B
7. A
8. B
9. A
10. C
11. D
12. C
13. C
14. A
15. C
16. C
17. A
18. B
19. D
20. D
解析:
这是一篇科普类短文。本文讲述的主题是“尽管人的寿命在延长,但随着岁月的流失,人人都会衰老,最终将面临死亡”。
1. C 根据句意:但是人们现在比过去寿命高。used to表示“过去经常做……”,暗示现在并不如此,此处指过去的情况,正好与句义相符。would可表示“过去经常”,但不含“今昔对比”之意。注意该词组与be used to的区别,后者意为“习惯于……”, to为介词。D项之所以不对,是因为在以下词组中,当不定式省略时,通常要保留不定式符号to,如:used to, be going to, mean to, ought to, try to, plan to等。
2. B 根据下文中的定语从句所表示的意义进行判断,这里所填入的单词应该表示“衰老的结果”这一意义。effect意为“结果,影响”,正是此意。function“功能,机能,作用”;affect“影响,感动”,是动词;sign“标记”。解题时要注意effect和affect拼写只相差一个字母,但effect是名词而affect是动词。
3. D 根据主句内容,which引导非限制性定语从句,which表示前面的“衰老的结果”,即:衰老的结果最终导致死亡。result in“使发生,导致”;lead in无此搭配,在表示“导致”时,应为lead to;give in “让步,屈服”;run into“陷入”,常指陷入困境。
4. D 根据上下文及信息词cells可确定句中是指所有的部位(器官)。而其他三项所指的都是身体的具体部位。
5. C 此句中的did是用来代替前面的动词function,以避免重复。因为这里有一个表示过去的时间状语in childhood and teenage years,所以只能用一般过去时。
6. B protection“保护,保护物”,和介词against或from连用,译为“保护……免遭……”。此句义为“身体此时的免疫力下降,易于患病”;energy“精力,活力”; vigor“力量,活力”;power“权力,力气”。
7. A likely, possible和probable它们三者都表示“可能”,均可以构成:It is possible / probable / likely +that从句。但probable 和possible不能用于sb.is possible / probable to do sth.句型中。如:It will be possible / probable / likely for you to get there before eight o'clock.你有可能在8点钟之前赶到那里。 You will be likely to get there before 8 o'clock. 你很有可能在8点钟之前赶到那里。alike“相似的”,不符句意。
8. B 根据句义:有一些相关的原因可能促使人衰老。contribute to“有助于,起作用,促成”,此意义符合句义。attend to“专心于”;add to“增加,把……添加到……”;devote to“致力于,献身于”。这四个词组中的to都是介词,要注意它和不定式符号to的区别。
9. A 此句与下文相对应,根据下文第十一空之后出现的replace (代替)可确定该空选replaced;reborn“新生的,复活的”;recovered“恢复”;surrendered “屈服”
10. C 根据此句的谓语动词decreases可确定其主语应为the number,表示 “……的数量”,作主语时,应该使用单数的谓语动词;a number of“许多,大量”常用来修饰复数名词,做主语时,要使用复数谓语动词;the amount of“……的数量是”,常接不可数名词;a great deal of “大量的”,后接不可数名词。
11. D 根据这一段里谈到的不同情况的细胞,上文用了some cells of the body不能再生,很显然下文中用other body cells可以被新的细胞所代替。这样other与上文的some相呼应。其他词都不能起此作用。
12. C 根据上文的意思,这里还在继续谈论第二种可再生细胞,即:the new cells。
13. C be capable of是固定搭配,表示“有……的能力”。句中指:老年人的新细胞的发展能力不如年轻人的强。其他介词不与capable搭配。
14. A 这一段的内容是和上段相对应的,所需词相当于上段第一句中的cause,指造成一种事实或现象的原因,所以选用factor,表“因素,要素”。其他几个词虽然语义相近,但所强调的重点并不相同。effect“结果”;reason“原因”,用来说明一种看法或行为的理由;element“元素”。
15. C 此句意是:另一个导致衰老的因素是细胞内本身的变化。由此可得出,空格处需填一个作同位语的名词或代词,那么四个选项中,就只有themselves可担当此任,即:反身代词themselves做cells的同位语。
16. C 本句是被动句式,其主动句式是:It is known that some of the protein chemicals in cells change with age and become less elastic。意为:大家知道细胞内有些蛋白质随着年龄的增大而改变,变得没有那么有弹性。又如:It is known that a new hospital will be built here. = A new hospital is known to be built here。在叙述一般性事物时,动词know之后的不定式不用进行式和完成式。
17. A hang在这里是用作系动词,后面须接一个形容词作表语,类似的动词还有: rise,shine,sit,lie等,如:The sun rose red. (= The sun rose and it is red.)。本句除了要注意hang是系动词外,还要注意时态的选择。因为通篇文章所谈论的是人人都要变老的客观事实,所用时态都为一般现在时,不能用进行时。
18. B 根据句义“这就是为什么老人的身高会收缩的原因”,因此表“收缩”的只有shrink;increase“增加”和1engthen“变长”与句义不符; decrease“减少”,一般强调量的减少,也不符合题义。特别说明的是shrink这个词平常用得不太多,但它仍然是中学英语“新课标”词汇,它的过去式形式是shrank或shrunk,过去分词形式是shrunk 或shrunken。
19. D 根据上下文内容应选pass on,表示“把……传给另一个,转移”,句中store and pass on information指“储存和传递信息”,符合句意。其他三个选项都不符句意。pass away“去世”;pass by“经过,从……旁边走过”;pass off“逐渐消失,停止”。
20. D 从通篇文章所叙述的人的衰老的过程分析,我们应该在此处选填process。表示“自然的过程,进程”,符合上下文意义;即:衰老可能影响这种进程和改变信息;improvement“改良”;procession“队伍,行列”;approach“方式,方法”。