高一英语unit3语法宾语从句练习题及答案.doc

高一英语unit3语法宾语从句练习题及答案清华大学英语系测试：为中小学生英语量身定做.官方网站：/ 清华大学英语教授研究组提供宾语从句专练类型一：引导词的运用(1) I dont know _or not. A. whether he is at home B. if he is at home C. that he is at home D. whether is he at home (2) This depends on _ the weather is fine.A. which B. whether C. if D. that (3) The teacher asked the new student _ class he was in. A. which B. where C. if D. that (4) I dont know _ Mr. Green will come to see us. Hell help us with our English. A. why B. when C. how D. where (5) - Be careful! Dont break the bottles. Do you hear _ I said? David? - Yes, Mum A. what B. that C. why D. if (6) - Do you know _ Mr Blacks address is? - He may live at NO.18 or No. 19 of Bridge Street. Im not sure of _. A.where, which B. where, what C. what, which D. what, where (7) There is not much difference between the two. I really dont know _. A. what should I choose B. which I should choose C. which should I choose D. what I should choose 类型二：宾语从句的语序陈述句语序 (1) Did you find out _? A. she was looking for whose child B. whose child was she looking for C. whose child she is looking for D. whose child she was looking for (2) Are you interested in _? A. how did he do it B. he did it how C. how he did it D. he how did it (3) I dont know _. Can you tell me? A. how the two players are old B. how old are the two players C. the two players are how old D. how old the two players are (4) - What did the scientist say? - He said he wondered if _ into space by spaceship one day. A. he had to fly B. he could fly C. can he fly D. could he fly (5) Excuse me, sir. Could you tell me _? A. Where the bank nearest B. where is the nearest bank C. where the nearest bank is D. the nearest bank is where （6）She asked Tom _ with his car?A. what the matter was B. what the matter isC. what was the matter D. what is the matter类型三：时态 (1) Its 7:30. I cant believe you_ cooking dinner yet, Sally. A. havent started B. didnt C. dont start D. hadnt started (2) The teacher told us yesterday that December 25 _ Christmas Day. A. is B. was C. has been D. will be (3)The teacher said that the earth _round the sun. A. goes B. go C. went D. will go (4) We d like to tell you that you _the exam. A. have passed B. had passed C. pass D. will pass (5)“Could you tell me_?” “ Yes. They _ to the library.” A. where are the twins, have been B. where were the twins, have been C. where the twins are, have gone D, where the twins were, have gone (6) Our father said that he _ a new computer next week. A. will buy B. have bought C. would buy D. buys (7)I hear that he _ to Beijing yesterday. A. goes B. will go C. went D. have gone 类型四：其他-反意疑问句，it做形式宾语(1)I dont think he is right,_?Aisnt he Bis he Cdo I Ddont I (2). He believes she is right, _?Adoesnt he Bdoes he Cis she Disnt she(3).I thought that he disliked playing football,_?Adidnt he Bdid he Cdid I Ddidnt I (4). I find _ important that we practice English every day.A. it B. this C. that D. what(5). You cant imagine _when they received the nice gift.A. how they were excited B. how excited they wereC. how excited were they D. they were how excited高考题1What did you parents think about your decision? They always let me do _ I think I should. （06 全国）A. when B. that C. how D. what 2. Please remind me _ he said he was going. I may be in time to see him off. A. where B. when C. how D. what （06 全国） 3. Mary wrote an article on the team had failed to win the game. （05全国卷） Awhy Bwhat Cwho Dthat 4Someone is ringing the doorbell Go and see_.（2000 上海）A .who is he B. who he is C. who is it D. who it is5. We havent heard from Jane for a long time.What do you consider _to her?（NMET 1990）A. was happening B. to happen C .has happened D. happening答案 类型一：ABABACB类型二DCDBCC类型三AAAACCC类型四BAAAB高考题DBADC 英语作文写作模板模板1：观点对比 The topic about is becoming more and more popular in our school recently. There are two sides of opinion about it.Some students prefer to consider doing sth.(Some students say is their favorite.) they think that (理由一).Whats more, (理由二).Moreover, (理由三)However, others believe is a better choice for three reasons. (然而，其余的人认为做某事是一种较好的选择，有三个方面的理由) to begin with, (理由一). Next, . In addition, From my point of view, the former is surely a wise choice. The reason is that(或者用：As far as I am concerned, I firmly support the view that(依我来看，我坚决支持这种观点 that引导同位语从句)模板：好处与坏处的对比1.In recent years, has been popular. There are many advantages in. First, Second, . Third, However, therere some disadvantages. . (之一).Besides, .(之二). Also, . (之三)In my opinion, it is true that advantages are more than disadvantages.(依我看，的确是好处多于坏处) I thinkOne big advantage of is that. / One obvious advantage of is . / Finally, While it is true that . has many advantages, it is also important to realize that.(虽然某事确实有许多好处，但是意识到也很重要。 模板: 问题与建议1.In recent days, we have to face a problem that (近来，我们面临这样一个问题 that 引导同位语从句). 解决办法：With the help of modern technology, we now have many means to solve it. By doing ., we can Whats the most important is that结论：in a word, it is clear / obvious that Only when can we .模板: 要求论述两个对立的观点并给出自己的看法。1.有一些人认为 2.另一些人认为 3.我的看法 The topic of _（主题）is becoming more and more popular recently. There are two sides of opinions about it. Some people say A is their favorite. They hold their view for the reason of _（支持A的理由一）What is more, (理由二). Moreover, _(理由三). While others think that B is a better choice in the following three reasons. Firstly,_(支持B的理由一). Secondly (besides),_（理由二）. Thirdly (finally),_(理由三). From my point of view, I think _(我的观点）.The reason is that _(原因). As a matter of fact, there are some other reasons to explain my choice. For me, the former is surely a wise choice .模板:给出一个观点，要求考生反对这一观点 Some people believe that _（观点一）. For example, they think _（举例说明）And it will bring them _(为他们带来的好处). In my opinion, I never think this reason can be the point. For one thing,_(我不同意该看法的理由一). For another thing, _(反对的理由之二) Form all what I have said/In a word/In conclusion, I agree to the thought that _(我对文章所讨论主题的看法)模板：解决方法题型要求考生列举出解决问题的多种途径.问题现状.怎样解决(解决方案的优缺点)In recent days, we have to face a problem A, which is becoming more and more serious. First, _(说明的现状)Second, _(举例进一步说明现状)Confronted with A, we should take a series of effective measures to cope with the situation. For one thing, _(解决方法一). For another thing _(解决方法二). Finally, _(解决方法三). Personally, I believe that _(我的解决方法). Consequently, Im confident that a bright future is awaiting us because _(带来的好处).模板：说明利弊题型 这种题型往往要求先说明一下现状，再对比事物本身的利弊，有时也会单从一个角度（利或弊）出发，最后往往要求考生表明自己的态度（或对事物前景提出预测）.说明事物现状.事物本身的优缺点（或一方面）.你对现状（或前景）的看法 Nowadays many people prefer A because it has a significant role in our daily life. Generally, its advantages can be seen as follows. First _(的优点之一). Besides _（的优点之二）.But every coin has two sides. The negative aspects are also apparent. One of the important disadvantages is that _(的第一个缺点)To make matters worse,_(的第二个缺点) Through the above analysis, I believe that the positive aspects overweigh the negative ones. Therefore, I would like to _(我的看法) 高考英语单选15大解题技巧1. 找准关键词语有时题干中带有对解题起着关键作用的词语，如果能迅速找准这些词语，再结合各选项的意义和特点，就能很快选出正确答案。例如：The Foreign Minister said, “_ our hope that the two sides will work towards peace.”A. This is B. There is C. That is D. It is解析：在名词性从句中，that既无词义，也不作句子成分，连接一个句子成分完整的陈述句。根据句意和句子结构，特别是that的暗示，可判断题干为一个含有主语从句的复合句，句首的it为形式主语，真正的主语为其后的that从句，故最佳答案为D。2. 分析句子结构有些试题的考点本来十分简单，但命题者却通过使用定语从句，或者将我们熟悉的固定词组有意拆分，重新组合，使我们在结构上产生错觉，出现迷惑。这时，我们只要保持清醒的头脑，仔细分析句子的结构，就会拨开迷雾。例如：We keep in touch _ writing often.A. with B. of C. on D. by解析：许多同学根据 keep in touch with （与保持联系）这一搭配推断出此题应选A。但是选A错了，因为套此搭配此句意思不通，正确答案应是D，by 表示方式，by writing 意为“通过写信”，全句意为“我们通过经常写信保持联系”。请再看两例：(1) Weve talked a lot _ cars. What about trains?A. of B. with C. about D. in解析：由于受 a lot of 这一常用结构的影响，许多同学毫不犹豫地选了A，但是错了。原因是：若选 of，a lot of cars 即为动词 talk 的宾语，但事实上，动词 talk 是不及物动词。正确答案是C，句中的a lot是修饰动词 talked 的状语，talk about才是一个动词短语。 全句意为“我们对汽车已谈了不少，现在谈谈火车怎么样?”(2) We all regarded the poor old man _sympathy.A. as B. with C. of D. by解析：许多同学一看到句中的 regard 和选项中的 as，马上就联想到 regard as （把看作）这一搭配，从而断定此题应选A。错了，原因是将此搭配套入原句，句子意思不通。正确答案是B，句意为“我们大家都很同情这位老人”。3. 适当转换句式有时将题干的句式转换成自己更熟悉的句式，就很容易选出正确答案。比如将疑问句、强调句、感叹句或倒装句改为陈述句，将被动句改为主动句，无序句调整为正常句。例如：Mr. Wang, whom would you rather _ the important meeting?Tom.A. have attend B. have attendedC. having attend D. have to attend解析： 若将疑问句改为陈述句，就是I would rather have Tom attend the important meeting. 其中would rather后必须接动词原形，have sb. do sth.是“要某人做某事”。所以选A。4. 补全省略成分口语中常常会使用一些省略句，做题时若将被省略的成分补充完整，答案就会一目了然。例如：What do you think made Mary so upset? _ her new bike.A. As she lost B. Lost C. Losing D. Because of losing解析：将答句补全，就是 _ her new bike made Mary so upset,显然，只能选C，用动名词短语作主语。5. 删除干扰部分就是将起干扰作用的定语从句、介词短语或插入语，如I think / suppose / believe, do you think / suppose / believe, you know, of course等删除，从而更容易地选出正确答案。例如：It is the ability to do the job _matters not where you come from or what you are.A. one B. that C. what D. it解析：去掉题干中的not where you come from or what you are，题干即为是一个简单句：The ability to do the job matters. 把主语The ability 放在强调结构中，即变为题干，显然最佳答案为B。基本上不看短文内容仅看选项，2010年高考有人竟然过了100分！高考有没有瞬间大幅度提分的可能？谁能让你不用花很多时间和心思学习，英语就能提高至少20-30分？要是真的话，简直是白捡的分数！不仅如此，当你了解了高考真题答案的所有内幕规律，看到了绝密的解题招式，就会豁然开朗。哇！原来也可以这么做题！你的思路因此将会被彻底打通，提高的分数将不仅仅是20-30分！无论现在的英语成绩是60分，还是110分，任何人都可以做到！这些绝密招式是太简单、太震撼了！所以，如果你看到了，切勿告诉他人，否则，他们会在高考中轻松超过你！请注意!如果你不相信这世上有考试秘诀，请立即将您的眼睛离开；如果你习惯于按照传统思路做题，不希望有思维上的突破，请你立即将您的眼睛离开；如果你现在的成绩已接近满分，甚至已是满分，请你立即将您的眼睛离开；如果你患有心理疾病或心脏病，请您立即将您的眼睛离开；如果你选择留下来，那么接下来的事，很可能让你目瞪口呆！如果我告诉你N个秘诀，在做完形填空和阅读理解题时，不用看文章和题干，只是简单的比较四个选项，就能瞬间选出正确答案，你是否想看？请先看下面的例子，它是辽宁卷2010年真题的第36题，是一个完形填空题. 在此我只列出它的四个选项,试试看，只是比较选项，你是否能够在3秒之内选出正确答案?36. A. worried B. sad C. surprised D. nervous正确答案是C, ABD都是一个人状态不好的倾向词，而C则为中性词，表述态度不一致者是答案。.如果你知道了这个秘诀，可以解决很多类似的完型填空题!看一下辽宁卷2010年完形填空真题的第52题:52. A. Largely B. Generally C. Gradually D. Probably正确答案是C, ABD都是含义不肯定的副词，排除表述不明确的选项,答案就水落石出了. 如果你知道了这个秘诀，你更是可以解决很多类似的完型填空题! 试想一下,知道了全部36个完形秘诀之后,您的分数会怎么样呢?请再看下面的例子，它是辽宁卷2010年真题阅读理解题的第56题，在此我只写出它的题干和四个选项.也试试看，只是比较选项，你是否能够在5秒之内选出正确答案?56. From Paragragh 1 we learn that the villagers . A.worked very hard for centuries B.dreamed of having a better life C.were poor but somewhat content D.lived a different life from their forefathers正确答案是C, 选项中表述的内容前后相互矛盾的是答案! 思路很简单，如果你掌握了其中的秘诀，抛开文章，你也可以很快选出正确答案. 掌握此类瞬间解题秘诀，不仅缩短了答题时间，还能保障近乎100%的准确率！请上或上百度,输入沈阳英语家教吴军查询!吴军英语高分密码，让您第一次课就提10分！20次课提25-62分！模棱两可处和看不懂，该怎么办？要知道，如果对文章似懂非懂，那么，在文章中寻找答案线索就像大海捞针一样的难,更谈不上做对题！吴军英语高分密码将会告诉你此类瞬间解题秘诀,帮助你辨识选项中的诸多暗示点，瞬间找出正确答案,或者瞬间排除错误选项.请记住!在英语完型填空和阅读理解题的选项中，从头到尾都充满了暗示点,善于利用这些暗示点，可以快速做对题! 无论任何人，在考试中，总会遇到吃不准选项的题，或可以称之为不会做的“难题”,那么，如果遇到“难题”，你会怎办？是放弃？不可能，怎么着也要“猜”出一个答案!那么，是“瞎猜”吗？如果是“瞎猜”，其正确率仅是25%，是可想而知的低！那么，如何“猜”才能有高的准确率呢？如果我告诉你N个秘诀,让你在做“难题”时，猜出的答案的准确率由25%提高至95%，甚至是100%,你愿意继续看下去吗?35. A. eat up B. deal with C. throw away D. send out35题在B和C模棱两可处到底选哪个? 当然选范围大的,能包括另一个的,即选B.再举个例子，假如2010年辽宁卷高考英语完形填空的47题,不知选哪个, 怎么办？As I found out, there is, 46 , often no perfect equivalence(对应)between two 47 in two languages. My aunt even goes so far as to 48 that a Chinese “equivalent” can never give you the 49 meaning of a word in English!47. A. words B. names C. ideas D. characters很简单，选A，勿须有任何的犹豫,为什么？复现法则!吴军英语高分密码会告诉你具体原因以及更多的解决“难题”的秘诀,都是非常的简单和直接.请记住!遇到“难题”，即使“猜”答案，也要“猜”的有理有据,切勿盲目的“猜”! The moment he was about to 47 the hospital, he saw on the desk the 48 new book ,just as he had left it one 49 ago. 48. A much B still C hardly D quite很简单，选B，为什么？答案高频词汇倾向归纳让你笑逐颜开!高频形容词 副词: suddenly, even, finally, first, last, again, also, however, though, although, yet, instead, even though, but, still等.吴军英语高分密码真的有这么神奇吗？是！一点儿没错！效果是绝对的真实！作为一种标准化考试，选择题本身是有很多缺陷的,这些缺陷就是暗示点，就是解题的突破口!吴军英语高分密码通过对历年真题的长时间的研究，对这些暗示点进行了全面、深入、细致的挖掘和整理,将其转化为超级解题秘诀!每一个秘诀的准确率都在95%以上，甚至是100% 吴军英语高分密码,真正做到了立竿见影！甚至是一剑封喉！单选280个考点,42个诀窍; 阅读16大满分攻略; 完形36绝招; 七选五6大原则; 改错36个规律;作文4大模板6-8页;不想考上一本、二本都很难!马上用吴军英语高分密码对照历年所有的高考真题进行逐一的验证吧! 遇到吴军老师，您太幸运了！请上或上百度,输入沈阳英语家教吴军查询!“当时学习，当时提分”的超实战家教！抚顺2中的徐金良同学,来时成绩是71分左右, 2009年高考成绩为117分;沈阳4中的刘洪鹏同学 来时成绩是46分, 2009年高考成绩为100分; 黑山1中的高三刘璐同学来时成绩是50-70分, 2010年高考成绩为113分！.孩子从小学开始，学习英语已经多年，孩子天天背单词、做习题、记笔记，做过的卷子岂止几百套，上千套，那么孩子的英语成绩一直在稳步提高吗？还是一直没有提高，甚至越学越落后、越学越迷茫？如果孩子的英语成绩一直提高不了，如果孩子一直抓不住重点、找不到感觉，就来找 “神奇”的吴军老师吧！在这里孩子马上就会体验到英语学习成绩“突飞猛进”的快乐！在这里一天提高几十分的孩子比比皆是！鲁美附中、沈音附中7人全部考取国本！热烈庆祝吴军一对一家教学员-2010届鲁美附中1班王巨龙、冯潇潇，沈音附中李同学（女，不愿公开全名）及沈阳2中补习班姜雯悦等7人考取鲁美和沈阳音乐学院！为什么一个英语烂到家的学生，在不到2-3个月内成绩突飞猛进？为什么英语基础几乎为零的学生经过他辅导10到20 次课，成绩就能迅速提升30-70多分？走捷径考高分的窍门是什么？沈阳高端英语快速提分名师吴军老师将为您咨询谜底。艺术类国本，英语小分很关键！9年的高分经验能成就了他们，同样也可以成就暂时停止成功的你！只学习5-10次课，英语成绩就提高了30多分！能接触到吴军老师英语高分密码的人太幸运了！如何把握中心，猜测题意，一听就会！融会贯通，举一反三！沈阳83中高二的金柏岑同学来时成绩是82分, 2010年学习5次课后的期末成绩为108分; 现就读于沈阳4中高二文科班的胡兢元同学来时成绩是91分, 13次课后的期末成绩为125分; 现就读于皇姑区沈阳10中高一的高雅慧同学来时成绩是90分左右, 2010年高一下学期期中考试的成绩为127分;现就读于沈阳东北育才高中本部高二的戴冠宇同学来时成绩是107分,学习后的成绩稳定在125140分之间，最好成绩是由倒数到班里前6名。2010年沈阳中考距离满分竟然只差了7分!2010届杏坛中学初三6班的周千会同学（女）， 2010年沈阳市铁西区一模才120分左右，其中一大半还是懵来的。跟吴军老师学习3-4次后，自己很快找到了英语学习的感觉，好像一下子容易了很多，二模考了135分。10次课后，中考距离满分竟然只差了七分，考了143分。她说没想到她的最高纪录竟然创造在2010年沈阳中考中！请上或上百度,输入沈阳英语家教吴军查询!2010中考冲刺,没想到效果居然这么好!2010届43中学初三13班的李圣同学（男），初三后成绩与其他同学突然拉大，成绩一直在80分左右，很少达到及格线90分，对自己没有信心，对英语家教更是排斥。跟吴军老师学习20次后，虽与好学生还有5-7分的差距，但又找到了初一前十名时的感觉。2010年沈阳中考虽然发挥不算理想（非选择手写部分基础不好），也达到了129分！请上或上百度,输入沈阳英语家教吴军查询!英语一对一家教授课内容单项选择 13条经典实战技巧,助你避开语法的干扰轻松得高分;完型填空 11个重要特点,10种判断技巧,彻底解决一错错一串、发挥不稳定两大难题;阅读理解 9大要点,9种提高方法轻松解决 做题慢准确率低等难题;短文改错 6大应试策略,6大提高方法让你拿分如探囊取物;书面表达 “黄金写作模型”,精辟独到的讲解,写出让阅卷老师无可挑剔的高分作文!以下情况不能提分:单词量要达到初二牛津8B水平（目标高考分数是70-95分），初二牛津9B水平（目标高考分数是95-115分），当次见效（通过现场实战做题，题也可以自己带,明显感觉提了8-10分），一般8-20次课达到目标！什么也不会（连羊sheep和睡觉sleep都分不清就别浪费家里的钱了），家里有钱也没用，”神”也帮不了你!心里形成强烈“自己不行”思维定势，不能迅速扭转的，应先找心理医生或另寻他法；一模40分,二模50分以上可以来,30分左右的得包5-8天,费用得1.5万起,否则拒访!不走心,每次课都没有问题,甚至连给的课后专项题或语境化词汇题都不做的, 拒访!非要学可以,成绩变化不大,就别来找我!仅上3-5次课就想提30-50分的别来,当次课提分是因为阅读或完形有了技巧性突破,但考点还没系统化,所以只能提10-15分. 提30-50分不是3-5次而是包3-5天!他的诚信宣言：1.我只能帮助孩子提高英语分数，而不能提高孩子基本功！2.现成绩125分以上的同学，建议不要参加。因为他们只有1015分的提分空间，性价比不合适！3.听完1小时内不满意，保证不问原因、不问理由、无条件地、全额退费！超过了，则按一课收取。讲课当中或讲完后，提供试题或自己带题，马上答题验证！再于下次补交10-20次的费用，3课内不满意可以退回未上课的所有费用，因用大量时间为您的孩子做个性化教案，故3课后恕不退还！本承诺已坚持了四年半！4保分”需要过程,中考高考结束后才能验证,到时就算退回了学费也买不回来孩子的时间和未来。Peter高分英语“立竿见影”当次课见效!每次课后都可以拿高考真题和你的期中/末考题来验证高分教案，答的正确率高或方法好使，就可以证明我们的教案有效！一般情况下，85分以上来的，都能在6-20课内提到105-135分。2009-2010年（吴军亲授的学生）高考130分以上的有39人，3个月内提高了50-70分的有17人。请上或上百度,输入沈阳英语家教吴军查询!6. 利用对称结构就是在做题过程中要善于利用and，but等并列连词。若前面是个句子，后面也必定是个句子，反之亦然；若连接的是几个动词，这几个动词也必定是同一时态或同一形式。例如：English has a large vocabulary, hasnt it?Yes. _ more words and expression_rs and you will find it easier to read and communicate.A. Know B. Knowing C. To know D. Known解析：因为第二个and后面是一个句子，所以前面也必定是一个句子，但前面这个句子没有主语，只能选用动词原形，构成一个祈使句，因此，正确答案是A。又如：On Saturday afternoon, Mrs. Green went to the market, _ some bananas and visited her cousin.A. bought B. buying C. to buy D. buy解析：因为and后面是过去式visited，前面也必定是动词的过去式，所以正确答案是A。7. 注意标点符号标点有时对我们做题有提示作用，不同的标点可能导致选不同的答案，同学们做题时，一定要小心。例如：There are eight tips in Dr. Rogers lecture on sleep, and one of them is:_to bed early unless you think it is necessary.A. doesnt go B. not to go C. not going D. dont go解析：此题很容易选B，认为是用不定式作表语。其实，冒号已经表明后面是Dr. Roger讲的原话，这原话应当是个句子，只有选D才构成一个否定形式的祈使句。8. 熟记固定搭配在平时的学习中注意积累一些常见的固定句式、动词与副词的搭配、名词与形容词的搭配等等，对做题十分有利。例如：Mr. Smith used to smoke _ but he has given it up.A. seriously B. heavily C. badly D. hardly解析：因为指烟瘾或酒瘾很重，要用heavy或heavily，所以要选B。此外，雨雪下得“大”、烟雾“浓”、交通“拥挤”、波涛“汹涌”等，也用heavy。10. 检查有无谓语有时看似有两个句子，于是就选连词，正好掉进命题人设计的陷阱。事实上，有时貌似句子的“句子”却没有谓语，其中的动词只是一个非谓语动词（多为分词）。例如：He wrote five novels, two of _ translated into English.A. it B. them C. which D. that解析：此题很容易误选答案C，以为后面是非限制性定语从句。事实上，translated是过去分词，而不是谓语动词，后面不是句子，无需连词，所以正确答案是B。若在translated前加上were，were translated就是谓语，这时就选连词which了。11. 查看有无连词若经查实，前后的确是两个句子，就要看其中的一个分句是否已经用了连词。若已经有连词，一般不再用连词；若还没有用连词，就一定要选连词。例如：If an excellent Chinese novel is translated into English, _ means many more people in the world can enjoy it.A. as B. which C. what D. that解析：因为前句已经有连词if，所以选答案D，that指前句所述内容。若没有if，就选B，which引导一个非限制性定语从句。12. 识别相似句型有的句型十分相似，若不仔细分辨，明察秋毫，很容易出错。例如：_ is known to everybody, light travels much faster than sound.A. It B. As C. That D. What解析：此题选B，as引导一个非限制性定语从句，先行词是后面整个句子。若将逗号改为that，就选A，it是形式主语，that引导主语从句；若接着又在that前加上一个is，则应选D，what引导的是主语从句，that引导的是表语从句。13. 正确把握语境有时孤立地看留空格的那个句子，好像多个答案