高考英语常考题汇总及全面分析

这是一份高考英语常考题汇总及全面分析，共19页。
高考英语常考题汇总
第一部分:1-50 专项练习 第二部分:51-100全面解析


1．_________ we don't stop climate change, many animals and plants in the world will be gone.
A．Although B．While C．If D．Until
2．It's strange that he _______ have taken the books without the owner's permission.
A．would B．should C．could D．might
3．Every year, ______ makes the most beautiful kite will win a prize in the Kite Festival.
A．whatever B．whoever C．whomever D．whichever
4． Nowadays, cycling, along with jogging and swimming, _______ as one of the best all-round forms of exercise.
A．regard B．is regarded C．are regarded D．regards
5．Your support is important to our work. you can do helps.
A．However B．Whoever C．Whatever D．Wherever
6．I wish to thank Professor Smith, without ________ help I would never have got this far.
A．who B．whose C．whom D．which
7．_______ you can sleep well, you will lose the ability to focus, plan and stay motivated after one or two nights.
A．Once B．Unless C．If D．When
8．______ the average age of the population increases, there are more and more old people to care for.
A．Unless B．Until C．As D．While
9．I really enjoy listening to music ___ it helps me relax and takes my mind away from other cares of the day.
A．because B．before C．unless D．until
10． Do not let any failures discourage you, for you can never tell ________ close you may be to victory.
A．how B．that C．which D．where
11．______some people are motivated by a need for success, others are motivated by a fear of failure.
A．Because B．If C．Unless D．While
12．The exact year _____ Angela and her family spent together in China was 2008．
A．When B．where C．why D．which
13．Scientists have advanced many theories about why human beings cry tears , none of ______ has been proved.
A．whom B．which C．what D．that
14．We have entered into an age ________ dreams have the best chance of coming true.
A．which B．what C．when D．that
15．It was in that small house ________ was built with stones by his father ________ he spent his childhood.
A．that; where B．which; that C．which; which D．that; which
16．We will put off the picnic in the park until next week, ____ the weather may be better.
A．that B．where C．which D．when
17． My eldest son, _______ work takes him all over the world, is in New York at the moment.
A．that B．whose C．his D．who
18． The little problems ______ we meet in our daily lives may be inspirations for great inventions.
A．that B．as C．where D．when
19．The doctor shares his phone number with the patients ________ they need medical assistance.
A．if only B．as if C．even though D．in case
20．Most colleges now offer first-year students a course specially ___________ to help them succeed academically and personally.
A．designed B．designing C．to design D．being designed
21．Around 13,500 new jobs were created during the period, _______ the expected number of 12,000 held by market analysts.
A．having exceeded B．to exceed
C．exceeded D．exceeding
22． __________not for the support of the teachers,the student could not overcome her difficulty.
A．It were B．Were it C．It was D．Was it
23．Much time _____ sitting at a desk, office workers are generally troubled by health problems.
A．being spent B． having spent
C．spent D．spending
24．Many young people, most ______ were well-educated, headed for remote regions to chase their dreams.
A．of which B．of them C．of whom D．of those
25． ______ birds use their feathers for flight, some of their feathers are for other purposes.
A．Once B．If C．Although D．Because
26．Their child is at the stage__________ she can say individual words but not full sentences.
A．why B．where C．which D．what
27． no modern telecommunications, we would have to wait for weeks to get news from around the world.
A．Were there B．Had there been
C．If there are D．If there have been
28．Located_________the Belt meets the Road,Jiangsu will contribute more to the Belt and Road construction.
A．why B．when C．which D．where
29．We need to get to the root of the problem______ we can solve it.
A．while B．after C．before D．as
30． _____ the students came from different countries, they got along quite well in the summer camp.
A．While B．Unless C．Since D．Until
31．The exhibition tells us ______ we should do something to stop air pollution.
A．where B．why C．what D．which
32．Self-driving is an area _______ China and the rest of the world are on the same starting line.
A．that B．where C．which D．when
33．______ to nuclear radiation, even for a short time, may influence genes in human bodies.
A．Having exposed B．Being exposed C．To expose D．Exposed
34．In today's information age, the loss of data _________ cause serious problems for a company.
A．need B．should C．can D．must
35．In 1963 the UN set up the World Food Programme,one of_____purposes is to relieve worldwide starvation.
A．which B．it's C．whose D．whom
36．I have always enjoyed all the events you organized and I hope to attend ________ activities in the coming years.
A．little more B．no more C．much more D．many more
37．The gold medal will be awarded to ___________ wins the first place in the bicycler.
A．whomever B．wherever C．whoever D．whatever
38．Jane moved aimlessly down the tree-lined street, not knowing ______she was heading.
A．why B．where C．how D．when
39．— What did she want to know, Tom?
— She wondered ______ we could complete the experiment.
A．when was it B．it was when that
C．it was when D．when it was that
40． —Do you have Betty's phone number?
—Yes. Otherwise, I ______able to reach her yesterday.
A．hadn't been B．wouldn't have been
C．weren't D．wouldn't be
41．The professor warned the students that on no account _____________ use mobile phones in his class.
A．should they B．they should C．dare they D．they dare
42． If the new safety system _______ to use, the accident would never have happened.
A．had been put B．were put C．should be put D．would be put
43．It might have saved me some trouble ______ the schedule.
A．did I know B．have I known
C． do I know D．had I known
44．His comprehensive surveys have provided the most _________ statements of how, and on what basis, data are collected.
A．explicit B．ambiguous C．original D．arbitrary
45． ______ scientists have learned a lot about the universe, there is much we still don't know.
A．Once B．Since C．Though D．Unless
46．_________ along the old Silk Road is an interesting and rewarding experience.
A．Travel B．Traveling
C．Having traveled D．Traveled
47．By boat is the only way to get here, which is _______ we arrived.
A．where B．when C．why D．how
48．There is only one more day to go _____ your favorite music group play live.
A．since B．until C．when D．before
49．_______online shopping has changed our life, not all of its effects have been positive.
A．Since B．After C．While D．Unless
50．It is often the case ______anything is possible for those who hang on to hope.
A．why B．what C．as D．that


答案解析部分
1．C
2．B
3．B
4．B
5．C
6．B
7．B
8．C
9．A
10．A
11．D
12．D
13．B
14．C
15．B
16．D
17．B
18．A
19．D
20．A
21．D
22．B
23．C
24．C
25．C
26．B
27．A
28．D
29．C
30．A
31．B
32．B
33．B
34．C
35．C
36．D
37．C
38．B
39．D
40．B
41．A
42．A
43．D
44．A
45．C
46．B
47．D
48．D
49．C
50．D


高考英语常考题汇总
第一部分:1-50 专项练习 第二部分:51-100全面解析


1．_________ we don't stop climate change, many animals and plants in the world will be gone.
A．Although B．While C．If D．Until

全面分析：如果我们不阻止气候变化，世界上的许多动植物会消失。although虽然；while虽然；然而；if如果；until直到。根据句意可知此处表示假设，所以用if引导条件状语从句，故答案为C。

2．It's strange that he _______ have taken the books without the owner's permission.
A．would B．should C．could D．might

全面分析：真奇怪，他竟然没有经得主人的允许就把那些书拿走了。此处是主语从句中使用虚拟语气，should have+过去分词 表示意外的语气，意为“竟然”，故答案为B。

3．Every year, ______ makes the most beautiful kite will win a prize in the Kite Festival.
A．whatever B．whoever C．whomever D．whichever

全面分析：每年．只要做的风筝是最漂亮的，都会获得风筝节的奖品．根据句式可知，考查主语从句．句子缺少主语成分，再结合具体意思，"无论谁做的风筝漂亮都会获奖"，确定whoever．该句式等于Anyone who makes the most beautiful kite will win a…whomever在句子里不能充当主语；whatever是无论什么；whichever是无论哪一个都不符合题意．

4． Nowadays, cycling, along with jogging and swimming, _______ as one of the best all-round forms of exercise.
A．regard B．is regarded C．are regarded D．regards

全面分析：现在，骑车还有慢跑和游泳被认为是最好的全能运动之一。regard……as……把……看作……。cycling, along with jogging and swimming与regard构成被动关系，由along with连接的多个名词作主语时，谓语与along with前的名词保持一致，cycling是第三人称单数形式，故选B。

5．Your support is important to our work. you can do helps.
A．However B．Whoever C．Whatever D．Wherever

全面分析：题目考查主语从句。helps是谓语，“you can do”是主语成分，即主语从句，在主语从句中，do后缺少宾语，因此用whatever引导，故选C。

6．I wish to thank Professor Smith, without ________ help I would never have got this far.
A．who B．whose C．whom D．which

全面分析：我想要感谢史密斯教授，没有他的帮助我就不会走得这么远。whose是关系代词，引导定语从句，表示“……的”。考生容易误选C项，因为只看到了without whom语意上相当于without Professor Smith，而忽略了题干中的help。若选C项的话，可去掉题干中的help。

7．_______ you can sleep well, you will lose the ability to focus, plan and stay motivated after one or two nights.
A．Once B．Unless C．If D．When

全面分析：如果你睡眠不好，一两晚之后你将失去集中注意力、做出计划以及保持活力的能力。once一旦；unless如果不；除非；if如果；when当……时。根据前后句之间的逻辑关系，所以答案为B。

8．______ the average age of the population increases, there are more and more old people to care for.
A．Unless B．Until C．As D．While

全面分析：随着人口平均年龄的增长，越来越多的老人要照顾。Unless除非；until直到；as因为，正如，随着；while虽然，然而，当……时候。根据语境，故选C。

9．I really enjoy listening to music ___ it helps me relax and takes my mind away from other cares of the day.
A．because B．before C．unless D．until

全面分析：题目考查原因状语从句。句意：我非常喜欢过听音乐，因为它能让我放松，使我不去想其它的事情。前后是因果关系，故选A。

10． Do not let any failures discourage you, for you can never tell ________ close you may be to victory.
A．how B．that C．which D．where

全面分析：别为任何失败泄气，你永远无法知道你离能胜利胜利有多近。修饰副词close，用副词how，因此选A。

11．______some people are motivated by a need for success, others are motivated by a fear of failure.
A．Because B．If C．Unless D．While

全面分析：考查连词。连词because因为；if如果；unless除非，如果…不…；while尽管，然而，当……时；句意：尽管一些人被成功的渴望驱使着，但是其他人却被失败的恐惧驱使着前进。根据句意可知上下文之间存在转折关系，所以使用“while尽管……”连接。故D项正确。

12．The exact year _____ Angela and her family spent together in China was 2008．
A．When B．where C．why D．which

全面分析：安哥拉和她的家人一起在中国度过的那一年是2008年。本句主句为：“The exact year was 2008”。“ Angela and her family spent together in China”是定语从句，修饰先行the exact year，空处所填词在从句中作spend的宾语，故用关系代词which。故选D。

13．Scientists have advanced many theories about why human beings cry tears , none of ______ has been proved.
A．whom B．which C．what D．that

全面分析：考查定语从句。句意：关于人类为什么哭的时候会流泪，科学家已经提出了很多理论，没有一个被证明了。使用定语从句，先行词是theories，指物，定语从句中用代词+介词+关系代词which引导。故选B。

14．We have entered into an age ________ dreams have the best chance of coming true.
A．which B．what C．when D．that

全面分析：我们已经进入到了一个时代，在这个时代梦想实现的机会最大。句中先行词为an age（一个时代），且先行词在从句中做时间状语，所以关系词用when。 故选C。

15．It was in that small house ________ was built with stones by his father ________ he spent his childhood.
A．that; where B．which; that C．which; which D．that; which

全面分析：就是他父亲又石头建成的小房子里他度过了他的童年。第一空是定语从句，先行词是the small house，which指代先行词在句中做主语；第二空的that与it was构成强调句型，对中间的in the house which was built with stones进行强调。强调句型的基本结构为：it is/was+被强调成分+that/who+其它成分；强调句型的最大特点是把it is/was…that/who…去掉，句子仍然成立。故选B。

16．We will put off the picnic in the park until next week, ____ the weather may be better.
A．that B．where C．which D．when

全面分析： 句意：我们将把公园的野餐推迟到下个星期，那时天气可能会更好。使用定语从句，先行词是next week，定语从句中不缺少主宾表，缺少时间状语。故选D。

17． My eldest son, _______ work takes him all over the world, is in New York at the moment.
A．that B．whose C．his D．who

全面分析：我的大儿子，他的工作让他奔走于世界各地，现在在纽约。这是一个定语从句，work与先行词 son是所属关系，故用whose引导定语从句，因此选B。

18． The little problems ______ we meet in our daily lives may be inspirations for great inventions.
A．that B．as C．where D．when

全面分析：我们日常生活中遇到的小问题可能是伟大发明的灵感．A 考查定语从句．这是一个限制性定语从句．本句中的先行词是problems，在定语从句we meet in our daily lives中做宾语，所以用关系代词that引导．where 和when引导定语从句在从句中做状语．as引导非限制性定语从句．所以答案选A．

19．The doctor shares his phone number with the patients ________ they need medical assistance.
A．if only B．as if C．even though D．in case

全面分析：医生给了病人他的手机号码，以防病人需要医疗援助。A. if only“是......多好”；B. as if“好像，仿佛”；C. even though“即使，尽管”；D. in case“以备，以防，免得”。故选D。

20．Most colleges now offer first-year students a course specially ___________ to help them succeed academically and personally.
A．designed B．designing C．to design D．being designed

全面分析：现在大多数大学都为一年级学生开设了一门课程，专门帮助他们在学业和个人方面取得成功。a course 和 design之间是动宾关系，所以用过去分词，此处作定语，故选A。

21．Around 13,500 new jobs were created during the period, _______ the expected number of 12,000 held by market analysts.
A．having exceeded B．to exceed
C．exceeded D．exceeding

全面分析：在这期间，大约有13500份新工作被创造出来，超出了市场分析员预期的12000份。exceed超过，后有宾语the expected number，所以逻辑主语Around 13,500 new jobs与与exceed构成逻辑上的主谓关系，所以用现在分词作结果状语，而不定式作状语通常表示意外的结果所以B错误；having+过去分词 表示发生在谓语动词的动作之前，不符合此处的语境，所以排除A。故答案为D。

22． __________not for the support of the teachers,the student could not overcome her difficulty.
A．It were B．Were it C．It was D．Was it

全面分析：要不是老师的支持，那个学生就不能克服困难。这是一个虚拟条件句，虚拟语气中，be动词统一用were；虚拟语气的省略形式主要是把if省略，同时把were/should/had提前，即Were /Should/ Had I...，故选B。

23．Much time _____ sitting at a desk, office workers are generally troubled by health problems.
A．being spent B． having spent
C．spent D．spending

全面分析：上班族们坐在办工座前太久，一般会受到健康问题的困扰。分析句子结构可知，分词的逻辑主语和后面主句的主语不一致，应用独立主格结构。分词主语和分词动作之间构成逻辑上的动宾关系，且动作已完成，故用过去分词，故选 C项。

24．Many young people, most ______ were well-educated, headed for remote regions to chase their dreams.
A．of which B．of them C．of whom D．of those

全面分析：考查定语从句。本题定语从句的先行词是Many young people，关系代词whom指代先行词，在定语从句中作为of的宾语。句意：很多年轻人都前往偏远地区追求他们的梦想，期中大部分人都是受过良好教育。故C正确。

25． ______ birds use their feathers for flight, some of their feathers are for other purposes.
A．Once B．If C．Although D．Because

全面分析：虽然鸟类用羽毛飞行，但它们的一些羽毛是为了其他用途．once"一旦"，引导条件状语从句．if"如果"，引导条件状语从句．although"尽管，虽然"，引导让步状语从句．because"因为"，引导原因状语从句．分析可知前后两句话之间是逻辑上的"让步"关系，再结合句子所表达的意思可知答案选C．

26．Their child is at the stage__________ she can say individual words but not full sentences.
A．why B．where C．which D．what

全面分析：他们的孩子正处于能说单个单词而不能说完整句子的阶段。句中she can say individual words but not full sentences是一个定语从句，先行词是the stage，关系词在定语从句中作地点状语，用关系副词where，故选B。

27． no modern telecommunications, we would have to wait for weeks to get news from around the world.
A．Were there B．Had there been
C．If there are D．If there have been

全面分析：如果没有现代的电信业，要想得到世界各地的消息，我们就不得不等几个星期。本题是一个表示与现在相反 if 虚拟条件句，if 从句中使用“did/were”, 主句使用“情态动词(would/could/should/might)+动词原形”；而if虚拟条件句发生省略和倒装的条件是：从句谓语部分含有were/had/should。若满足该条件，可将if省去，将were/had/should提于句首，发生部分倒装。故 A 正确。

28．Located_________the Belt meets the Road,Jiangsu will contribute more to the Belt and Road construction.
A．why B．when C．which D．where

全面分析：位于带与路的交汇点，江苏将为一带一路的建设做出更大的贡献。词组：be located in……位于……，后跟地点名称，即“in+地点名称”在句中作地点状语，所以where代替并引导状语从句。故选D。

29．We need to get to the root of the problem______ we can solve it.
A．while B．after C．before D．as

全面分析：在我们解决问题之前，我们需要找到问题的根源。A.while当……时候，而；B.after在……之后；C.before在……之前；D.as正如。根据句意可知选C。

30． _____ the students came from different countries, they got along quite well in the summer camp.
A．While B．Unless C．Since D．Until

全面分析：考查连词辨析，这里是一个”While 引导的让步状语从句， A. While 尽管（引导让步状语从句）； B. Unless除非（通常用于条件状语从句）； C. Since 自从（引导时间状语从句）；D. Until直到才（通常用在时间状语从句中），结合句意：尽管学生都来自不同的国家，他们在夏令营里面者湘处得很好，故选A。

31．The exhibition tells us ______ we should do something to stop air pollution.
A．where B．why C．what D．which

全面分析：本句考查宾语从句的引导词，宾语从句中不缺少主语和宾语，故选项C错误，选项D是引导定语从句的，也错误，根据意思：这个展览告诉了我 们，我们为什么要停止空气污染而不是我们在哪儿停止空气污染，故选择B本题考查宾语从句的引导词。

32．Self-driving is an area _______ China and the rest of the world are on the same starting line.
A．that B．where C．which D．when

全面分析：自动驾驶是一个中国和世界其它地区在同一起跑线上的领域。这是一个定语从句，先行词area指地点，而且从句主系表结构完整，只缺少状语，所以用where引导，故答案为B。

33．______ to nuclear radiation, even for a short time, may influence genes in human bodies.
A．Having exposed B．Being exposed C．To expose D．Exposed

全面分析：暴露于核辐射中甚至很短时间都会影响人体的基因。分析句子成分发现even for a short time是插入语，may influence是谓语，前面的部分应该是主语，be exposed to“暴露于”，要用动名词Being exposed to。故答案选B。

34．In today's information age, the loss of data _________ cause serious problems for a company.
A．need B．should C．can D．must

全面分析：在当今的信息时代，数据的丢失对于一家公司来说有时候会造成严重的问题。need需要；should应该；can可能；能够；must必须；一定。本句是对现在情况进行可能的推测，can用于肯定句中表示：“有时候会”；而must意思是“一定会”，根据常识可知丢失数据可能会造成严重的问题，也可能不会造成严重问题，所以用can在逻辑上更严谨，故答案为C。

35．In 1963 the UN set up the World Food Programme,one of_____purposes is to relieve worldwide starvation.
A．which B．it's C．whose D．whom

全面分析：在1963年联合国设立世界粮食计划署，它的目的之一是缓解世界饥饿问题。这是一个定语从句，先行词是the World Food Programme，与purposes构成逻辑上的所属关系，故用whose，因此选C.

36．I have always enjoyed all the events you organized and I hope to attend ________ activities in the coming years.
A．little more B．no more C．much more D．many more

全面分析：考查短语辨析。句意：我一直很喜欢你组织的所有的活动并且希望在未来的几年里参加更多的活动。A.没有这个搭配；B.不再；C.多得多（修饰不可数名词）；D. many more更多（修饰可数名词）。这里修饰的是上文的activities。故选D。

37．The gold medal will be awarded to ___________ wins the first place in the bicycler.
A．whomever B．wherever C．whoever D．whatever

全面分析：无论谁获得自行车比赛第一名，金牌将授予他。分析句子可知，宾语从句中缺少主语，故用whoever，表示“任何人，无论谁”。故答案选C。

38．Jane moved aimlessly down the tree-lined street, not knowing ______she was heading.
A．why B．where C．how D．when

全面分析：Jane漫无目的沿着绿树成荫的街道走着，不知道她该往何方．句中she was heading作knowing的宾语，是一个宾语从句；前面的aimlessly表示漫无目的，说明的是不知道目的地，要用where来连接．故选B．

39．— What did she want to know, Tom?
— She wondered ______ we could complete the experiment.
A．when was it B．it was when that
C．it was when D．when it was that

全面分析：“她想知道什么，汤姆？”“她想知道我们什么时候才能完成实验。”分析句子意思以及句子结构可知，空格部分为强调特殊疑问词when，且为宾语从句结构，故特殊疑问句必须置于主从句之间，并且要使用陈述语序。故D选项正确。

40． —Do you have Betty's phone number?
—Yes. Otherwise, I ______able to reach her yesterday.
A．hadn't been B．wouldn't have been
C．weren't D．wouldn't be

全面分析：——你有贝蒂的电话号码吗？——有。否则的话我昨天就不能联系上她了。这是一个虚拟语气，句中的yesterday是过去时间，otherwise相当于虚拟条件句if I hadn't had her phone number，主句用would have+过去分词的形式。故选B。

41．The professor warned the students that on no account _____________ use mobile phones in his class.
A．should they B．they should C．dare they D．they dare

全面分析：这位教授警告学生们，在他的课堂上，决不应该使用手机。on no account“决不”，否定词放在句首，句子使用部分倒装，should应该，dare敢于，根据句意表示“应该”，故选A。

42． If the new safety system _______ to use, the accident would never have happened.
A．had been put B．were put C．should be put D．would be put

全面分析：如果新的安全系统被投入使用，这个事故本就不会发生．根据句意可知，考查虚拟语气．跟故去事实相反，从句用had done，主句用would have done，再结合new safety system 是被投入使用，故用had been done，即答案为A．

43．It might have saved me some trouble ______ the schedule.
A．did I know B．have I known
C． do I know D．had I known

全面分析：如果我早知道日程安排，可能会省去我一些麻烦，根据题干中might have saved 可知主句是对过去的虚拟，从句应从if had known与主句保持一致。if虚拟条件句中含有had时，可将if省去，同时将had提前构成倒装结构。故选D项。

44．His comprehensive surveys have provided the most _________ statements of how, and on what basis, data are collected.
A．explicit B．ambiguous C．original D．arbitrary

全面分析：考查形容词词义辨析。形容词explicit明晰的，清楚的；ambiguous模棱两可的，含糊不清的；original原始的，最初的；arbitrary任意的，专制的；句意：对于如何以及在什么基础上收集数据，他的综合调查提供了最清晰的说明。故A正确。
45． ______ scientists have learned a lot about the universe, there is much we still don't know.
A．Once B．Since C．Though D．Unless

全面分析：虽然科学家已经了解到很多有关宇宙的知识，但是，对于我们来说，仍然还有很多未解之谜．A一旦；B既然，自从；C虽然；D除非。once和unless表示条件，since表示原因或时间；though表示让步或转折，故选c

46．_________ along the old Silk Road is an interesting and rewarding experience.
A．Travel B．Traveling
C．Having traveled D．Traveled

全面分析：沿着古丝绸之路旅行是一次有趣且很值得的经历。此处是句子的主语，所以用动名词travelling。动词原形、过去式和分词都不能作主语，故答案为B。


47．By boat is the only way to get here, which is _______ we arrived.
A．where B．when C．why D．how

全面分析：乘船是到这儿的唯一方式，那就是我们怎么到达的。where哪里；when何时；why为什么；how怎样。这是一个表语从句，by boat表示方式，所以用how，故答案为D。


48．There is only one more day to go _____ your favorite music group play live.
A．since B．until C．when D．before

全面分析：选项A意为自从，选项B意为直到，选项C意为当...时候，D项意为在...之前，此题前一部分句意为：还有一天，后一部分句意为，你最喜欢的乐队现场表演，根据句意选择D，句意为还有一天你最喜欢的乐队建会现场演奏.

49．_______online shopping has changed our life, not all of its effects have been positive.
A．Since B．After C．While D．Unless

全面分析：考查连词。句意：尽管网上购物已经改变了我们的生活，但是不是所有的影响都是积极的。While引导让步状语从句，意为“尽管，虽然”；since既然，自从；after在……之后；unless除非。故选C。

50．It is often the case ______anything is possible for those who hang on to hope.
A．why B．what C．as D．that

全面分析：考查主语从句。本句中it是形式主语，真正的主语是连接词that做引导的主语从句，连接词that在本句中不充当任何成分，只是一个引导词而已，不能省略。连接副词why要在句中作状语，连接代词what通常在句子中作主语、宾语或表语等；as通常不引导名词从句。句意：对于那些心存希望的人一切皆可能是是事实。故D正确。