Unit 1 Nature in the Balance 重点语法Grammar 省略-高一英语必修第三册单元重难点易错题精练（译林）

这是一份Unit 1 Nature in the Balance 重点语法Grammar 省略-高一英语必修第三册单元重难点易错题精练（译林），共15页。

Unit 1 Nature in the Balance
重点语法 省略
一、单项选择
1．When ________ to feel unworthy, children often work extra hard to please their parents.
A．to make B．making C．made D．having made
2．Though ________ to see us, the professor gave us a warm welcome.
A．surprising B．was surprise C．being surprised D．surprised
3．If ________ , the thief will be punished by the police.
A．catching B．catch C．caught D．is caught
4．When________challenges and setbacks, he remains________brave and firm.
A．faced with... determine B．facing...determined
C．in face of..determine D．facing with... determined
5．Even if families are less likely to eat together than ______, millions of Britons still sit down for Christmas dinner.
A．it had been before B．they had been before
C．the case was once D．was once the case
6．Every evening after dinner, if not ______ in reading books, she can be found _____ on the sofa watching TV.
A．absorbed; seating B．absorbing; sat
C．absorbed; seated D．absorbing; sitting
7．Examinees ________ the testing room during exam unless ________.
A．won’t leave; permitted B．aren’t leaving; being permitted
C．are not to leave; permitted D．shall not leave; being permitted
8．Though _________ in San Francisco, Dave Mitchell preferred to record the plain facts of small-town life.
A．raised B．grown C．developed D．cultivated
9．When ________to compare the education system of China and Britain, the professor gave no answer.
A．ask B．asking C．asked D．to ask
10．When _____, water can be changed into vapor.
A．heated B．being heated C．having been heated D．to heat
11．The boy wanted to play computer games, but his mother told him ________.
A．not to B．not to do C．not do it D．do not to
12．Unless otherwise ________ all the regulations apply to students in Senior Three.
A．to be stated B．stated C．stating D．is stated
13．I hope to see you at the office tomorrow, but if ________, do remember to leave me a message.
A．possible B．so C．not D．any
14．We were aware that, _____, the situation will get worse.
A．if not dealing with carefully B．if dealt not carefully with
C．if not carefully dealt with D．if not carefully dealing with
15．Father advised me not to say anything until ______ at the meeting.
A．asking B．asked C．to ask D．ask
16．—What do you think of Buckingham Palace?
—Marvelous! Once ______, it can never be forgotten.
A．saw B．to see C．seen D．seeing
17．One thing you can’t help but________when driving around Australia is the country’s plentiful amounts of space.
A．notice B．to notice C．to be noticed D．being noticed
18．The doctor threw himself from the horse, as if ________.
A．to be shot B．shooting C．shot D．to be shooting
19．When entering the office, ________.
A．we found Jimmy seating at a desk B．Jimmy was found sat at a desk
C．Jimmy was found sitting at a desk D．we found Jimmy seated at a desk
20．As is known to us all, ________, the situation will get worse.
A．not if dealt carefully with B．if not dealt carefully with
C．if dealt not carefully with D．not if carefully dealt with
21．—I hear John was badly injured in the accident.
—________, let’s go and see him.
A．If not B．If so
C．If necessary D．If possible
22．See if you can understand the following. _______, you can look them up in the dictionary.
A．If any B．If possible C．If needed D．If not
23．--- I hate talking with that guy. Look, he is coming. What should I do?
--- Don’t speak unless ________.
A．speaking B．spoken to C．spoken D．speaking to
24．You can’t be careful enough while ________the street.
A．crossing B．crossed C．to cross D．crossed
25．Engineers noticed that the pipes were not expanding ________.
A．as were expected B．as it was expected C．as expecting D．as expected
26．She had said little so far, responding only when_________.
A．speaking B．spoken to C．spoken D．speaking to
27．Generally speaking, ______ according to the directions, the drug has no side effect.
A．When taking B．when to taken C．when to take D．when taken
28．If ________ more time , we would have done the work better.
A．gave B．giving C．give D．given
29．Man may disappear________ other creatures who became too specialized to survive their environment.
A．as B．just as C．as if D．as have
30．When ________ in this way, your friendship will soon be repaired.
A．approach B．approaching C．to approach D．approached
二、用单词的适当形式完成句子
31．Some medicine, if wrongly ______(take), can kill a person.
32．Children are not permitted to enter the stadium unless ________(accompany) by parents.
33．They face a lot of challenges when________(try)to get food.
34．Though ________(defeat), he still felt happy.
35．Though ________(face) great pressure, the speakers bravely overcame it.
36．As ________(schedule), the cross-country running race was held last Friday.
37．It was a great success. About 30,000 players from different countries took part in it as __________ (schedule).
38．Many forms of cancer can be cured if ________(detect) early.
39．To guarantee security, children, when ________( accompany) by their parents, are allowed to enter the stadium.
40．When______ (compose) music at the piano, he would put one end of a pencil in his mouth and place the other end against the instrument so that he could feel the notes.
41．When ______(set)out on a long walk, always wear suitable shoes.
42．He packed his necessities as if ________ (have) a holiday.
43．As already ________(mention), the legislation does not consider low pay as an acceptable reason for turning down a job.
44．The engineers are also trying to develop an on and off “switch” where the glow would fade when ________(expose)to daylight.
45．While ________ (walk) along the paths, you can hear the sweet songs of bird.
46．Do not leave the building until __________(instruct) to do so.
47．Once __________(print), this dictionary will be very popular.
48．Granny fell asleep when ________(watch) TV.
49．I couldn’t find my key to the car when________(leave) home.
50．He will come here if____________ (ask).
51．I can’t help but________ (finish) the book based on a true story.
52．He opened his lips as if ___________ (say) something.
53．The air in the factory is seriously polluted. If _______(breathe) in, it may result in illness or even death.
54．The novels and non-fiction like biographies, autobiographies and comics will be available for purchase when__________(publish) next month.
55．We should work extra hours on the project to complete it as ________ (schedule) or even ahead of schedule.
56．Let them know that you are there to help in any way that is acceptable, while still________(respect)the privacy of your neighbour.
57．If________(press), he will admit that he knew about the affair.
58．Once ______(publish), his work became famous for the absence of rhyme at the end of each line.
59．You should be careful while ______(cross) the road.
60．The experiment shows that proper amounts of exercise, if ______(carry) out regularly, can improve our health.

参考答案：
1．C
【详解】考查状语从句的省略和过去分词。句意：当孩子们感到不值得时，他们往往会格外努力以取悦父母。在when引导的时间状语从句中，从句主语和主句相同，所以可省略从句中的主语和系动词。动词make意为“使，让”，和主语构成被动关系，所以此处应用过去分词形式。故选C。
2．D
【详解】考查形容词和状语从句的省略。句意：尽管看到我们很惊讶，教授热烈的欢迎了我们。表示“对……感到惊讶”用be surprised to do sth.；在状语从句中，当主从句主语一致，且从句有be时，可省略从句的主语和be，此处完整的从句为：Though he(the professor) was suprised to see us，省略了相同的主语he和was。故选D。
3．C
【详解】考查状语从句的省略。句意：如果小偷被抓住，将受到警察的惩罚。根据句意可知，空格处意为“他被抓住”，if引导的从句应是if he is caught，从句主语和主句主语一致，且从句中有be动词时，可省略从句中的主语和be动词，因此空格处是caught。故选C。
4．B
【详解】考查固定短语和形容词词义辨析。句意：面对挑战和挫折时，他仍然坚决，勇敢和坚定。A. faced with面对，determine决定； B. facing面对，determined坚决的；C. in face of面对， determine决定；D. facing with面对，determined坚定的。结合选项可知，when引导的状语从句完整形式为：when he is faced with/ when he is facing/ when he is in face of，可以省略其中的he is。第二个空应使用与brave和firm词义相近的词语determined，形容词作表语，但是D项的facing with 是错误的。故选B。
5．D
【详解】考查状语从句省略。句意：即使家庭成员不像以前那样喜欢一起吃饭，数百万英国人仍然会坐下来吃圣诞大餐。本处than用于比较两个句子的内容，即聚餐情况的比较，而不是主语本身状态的比较，故排除A、B两项；D项中从句省略了形式主语it 和真正主语that从句，补全从句则为：than it was once the case that families were，符合题意；than 所连接的两个待比较的句子有相同成分，通常会有所省略；故选D项。
6．C
【详解】考查省略句和非谓语动词。句意：每天晚饭后，如果不专心看书，她就会坐在沙发上看电视。分析句子结构可知，If引导条件状语从句，如果主从句主语一样，并且从句中谓语动词有be动词时，可省略if从句中的be动词和主语。一空处是sb be absorbed in doing sth为固定搭配，意为“某人全神贯注地做某事”。所以填absorbed。第二空seat是及物动词，构成seat sb结构，现在sb前置了，故用过去分词作主语补足语。故选C项。
7．A
【详解】考查时态和省略句。句意：考生在考试期间不可以离开考场，除非得到允许。分析句子可知，此句为条件状语从句的省略句。在状语从句中，当从句的的主语和主句主语一致且从句谓语动词为be动词的某种形式，可省略从句的主语和谓语，这句话原本为Examinees won’t leave the testing room during exam unless they are permitted.，省略了they are，剩下permitted，可排除B、D选项；条件状语从句遵循主将从现的语法规则，第一个空要用将来时，故选A项。
8．A
【详解】考查状语从句的省略。句意：尽管戴夫·米切尔在旧金山长大，但他更喜欢记录小城镇生活的简单事实。A. raised养育；B. grown成长；C. developed发展；D. cultivated培养。在when, while, if, as if, though (或although), as, until, once, whether, unless, where等连词连接的状语从句中，常省略跟主句相同的主语和be动词。结合句意，分析子可知，“Though _________ in San Francisco”是让步状语从句，原句为“Though Dave Mitchell was raised in San Francisco”，符合状语从句省略条件，省略Dave Mitchell was后，应保留过去分词raised。故选A。
9．C
【详解】考查时间状语从句的省略。句意：当被问及比较中国和英国的教育制度时，教授没有回答。分析句子可知，本句符合时间状语从句的省略情况，即主句主语与从句主语一致，均为the professor，且从句谓语动词含有be动词的时候，从句的主语和be动词可省略，所以此处其实完整从句为When (the professor was) asked to compare the education system of China and Britain，所以填asked，表示“被问到”。故选C项。
10．A
【详解】考查状语从句的省略。句意：当被加热时，水可以变成蒸汽。本句为状语从句的省略，还原为：When water is heated,省略了water is。故选A项。
11．A
【详解】考查不定式的省略。句意：男孩想玩电脑游戏，但他妈妈叫他不要这么做。分析句子可知，此处为不定式的省略，完整形式为：told him not to play computer games.，不定式的内容如果在后文中重复出现，为避免重复，可以省略后面的do，只保留不定式符号to，但当不定式符号后有be或have时，be和have要保留。故选A。
12．B
【详解】考查非谓语动词以及状语从句中的省略。句意：所有的规定都适用于高三学生，除非另有说明。从句意和句子结构可知unless 引导的条件状语从句的主语与主句主语“regulations”一致，“regulations”与“state”（解释，说明）之间是被动关系且从句为一般现时，即“unless they are otherwise stated”。当从句主语与主句主语一致，且谓语动词为be动词时，主语和be动词可以省略。故选B。
13．C
【详解】考查省略结构。句意：我希望明天能在办公室见到你，如果不能的话，记得给我留个口信。A. possible可能的；B. so如此；C. not不，不是；D. any任何。结合语意，如果不能在办公室见到的话，记得留口信，空处应用not，if not表示“如果不能的话”。故选C项。
14．C
【详解】考查状语从句的省略。句意：我们知道，如果不小心处理，情况会变得更糟。此处是状语从句的省略，分析句子可知，if引导的条件状语从句主语是the situation，和动词短语deal with之间是被动关系，故完整形式为if it is not carefully dealt with，状语从句主语和后面句子主语一致且从句含有be动词，可将状语从句的主语和be动词一起省略，故选C项。
15．B
【详解】考查状语从句的省略。句意：父亲建议我在会上被问到之前不要说话。分析句子可知，句子为“until”引导的时间状语从句，从句主语和主句主语一致且谓语中含有“be”，此时可以省略从句主语和“be”，省略之前为“until I was asked at the meeting”，句子主语“I”和“ask”为逻辑上的动宾关系，故空格处应用“ask”的过去分词“asked”。故选B项。
16．C
【详解】考查状语从句的省略。句意：——你觉得白金汉宫怎么样?——不可思议的！一旦看到，就永远不会忘记。本句为状语从句的省略，还原后为：Once it is seen,省略了it is。故选C。
17．A
【详解】考查固定短语。句意：当你开车环游澳大利亚时，你会不由自主地注意到一件事，那就是这个国家广阔的空间。此处为短语can’t help but do sth.，表示“只能做某事，不得不做”。故选A。
18．C
【详解】考查状语从句的省略。句意：医生从马背上跳了下来，好像中弹了。分析句子可知，the doctor和动词shoot之间是动宾关系，即“被打中”。后半句是as if he was shot。主句的主语和从句主语一致，且从句谓语动词是be动词，可省略从句的主语和谓语，故填shot，A项to be shot表示“将要被打中”，B项shooting表示主动关系，故选C项。
19．D
【详解】考查状语从句省略和固定搭配。句意：当进入办公室时，我们发现吉米正坐在一张椅子上。分析句子结构可知，when后面用的entering，说明enter这个动作是主句主语主动发出的动作，所以主句主语应该是we，这是when引导的时间状语从句的省略结构，完整的句子是When we were entering the office, we found Jimmy seated at a desk.主句用的是find+宾语+宾补的结构，动词seat用seated，表示Jimmy当时的状态。故选D。
20．B
【详解】考查状语从句的省略。句意：众所周知，如果不小心处理，情况会变得更糟。此处是状语从句的省略，if引导的条件状语从句中，主语和主句主语the situation一致，和谓语部分deal with之间是被动关系，故从句完整形式为if it is not dealt carefully with，当状语从句主语和主句主语一致且从句含有be动词时，可将从句主语和be动词省略，故选B项。
21．B
【详解】考查固定短语辨析。句意：——我听说John在事故中受了重伤。——如果是这样，我们去看看他吧。A. If not如果不是；B. If so如果是这样；C. If necessary如果必要的话；D. If possible如果可能的话。选项都是状语从句的省略用法，空后“let’s go and see him”的前提是John真的受伤了，if so表示“如果真这样”，符合语境。故选B项。
22．D
【详解】考查固定短语辨析。句意：看看你是否能理解以下内容。如果不能，你可以查字典。A. If any如果有；B. If possible如果可能；C. If needed如果需要；D. If not如果不。根据后文“you can look them up in the dictionary”和句意可知，此处表示应用If not“如果你不能”。故选D项。
23．B
【详解】考查省略句。句意：——我讨厌和那个家伙说话。看，他来了。我该怎么办?——不要说话，除非有人跟你说话。本题的答语部分是一个省略句。完整的结构应是： Don’t speak until you are spoken to。省略了主语you及be动词，根据句意应使用被动语态，speak to sb. 其被动 be spoken to。改为被动语态时应保留介词to。故选B项。
24．A
【详解】考查状语从句的省略。句意：过马路时再小心也不为过。分析句子可知，本句为状语从句的省略，在状语从句中，如果主句主语和从句主语为同一主语时，从句可以省略主语和系动词，所以从句省略了you are，从句表示“你正在穿过马路”，应用现在进行时，所以本句还原后为：You can’t be careful enough while you are crossing the street。故选A项。
25．D
【详解】考查状语从句。句意：工程师注意到管道没有像预期的那样膨胀。分析句子结构可知，设空处是由连接词as引导的状语从句，完整句子为as the pipes were expected，当状语从句主语与宾语从句主语the pipes一致，且谓语动词含有be动词，可省略状语从句的主语及be动词，保留expected。故选D项。
26．B
【详解】考查短语和状语从句的省略。句意：到目前为止，她几乎没说什么，只是在与她交谈时才做出回应。结合句意表达“与某人谈话”用speak to sb.；此处为状语从句的省略，完整的句子为：when she was spoken to，当主从句主语一致，且从句有be时，可以省略从句的主语和be。故选B。
27．D
【详解】考查状语从句的省略。句意：一般地说，当按照说明书来服药的话，药就没有副作用。根据句子结构可知，此句是时间状语从句，主从句的主语都是the drug，故从句可以省略主语及谓语。the drug与take是动宾关系，故用被动语态。根据has可知，时态是一般现在时，还原句子：Generally speaking, when the drug is taken according to the directions, the drug has no side effect.，将主语及谓语省略，故填when taken。故选D。
28．D
【详解】考查状语从句的省略。句意：如果给我们更多的时间，我们会把工作做得更好。A.gave给（过去式）；B. giving给（动名词或现在分词）；C. give给；D.given给（过去分词）。本句为状语从句的省略，还原后为：If we were given, 省略了we were。故选D。
29．D
【详解】考查倒装语序。句意：人们可能会像其他太依赖于在它们自己的环境存活的生物一样消失。这里as引导方式状语从句，从句结构不完整，主语是other creatures（其它生物），后面的定语从句是修饰主语的，other creatures缺失谓语动词，那么这里用到的就是倒装。正常语序应该是Other creatures who became too specialized to survive their environment have disappeared。（其他太依赖于在它们自己的环境存活的生物已经消失了。），这里把have提前，因为和前面的句子有同样的谓语动词，所以进行了省略，避免重复，故选D。
30．D
【详解】考查状语从句的省略。句意：以这种方式接触，你们的友谊很快就会修复。在状语从句中，如果从句的主语与主句的主语相同，且有be动词时，可省略主语和be动词。主语your friendship和谓语动词approach之间为被动关系，即完整的句子为when your friendship is approached in this way。省略之后为when approached in this way。故选D。
31．taken
【详解】考查状语从句的省略。句意：一些药，如果服用不当，可能会致命。根据句子分析可知，本句为状语从句的省略，还原为：if some medicine is wrongly taken，省略了主语和be动词。故填taken。
32．accompanied
【详解】考查状语从句的省略。句意：除非有父母的陪同，孩子们被允许进入体育馆。unless引导条件状语从句，主从句主语一致，从句含有be动词形式，可省略从句主语和be动词形式，children与accompany是被动关系，从句为unless they are accompanied by parents，省略后为accompanied by parents，故填accompanied。
33．trying
【详解】考查省略句。句意：他们在获取食物时面临着很多挑战。此处是状语从句的省略，因主语they和前面的主语一致，故省略they和be动词。故填trying。
34．defeated
【详解】考查状语从句省略。句意：尽管失败了，他仍然感到高兴。分析句子可知，这里考查状语从句的省略，从句中的主语和主句中的主语一致，并且含有be动词时，可把从句中的主语和be动词同时省略，只需考虑所给动词和主语的逻辑关系，而本句中defeat与he是被动关系，用过去分词。故填defeated。
35．facing
【详解】考查状语从句的省略。句意：虽然演汫者们面对巨大的压力，但是他们都勇敢地克服了。此处为状语从句的省略，当让步状语从句的主语与主句主语一致且从句含有be动词时，可将从句主语及be动间一起省略，此处的完整句子为Though the speakers were facing great pressure, the speakers bravely overcame it.故填facing。
36．scheduled
【详解】考查过去分词以及状语从句的省略。句意：按照计划，越野跑比赛于上周五举行。分析句子可知，设空处是方式状语从句的省略，完整从句应是：As it was scheduled，此处it代指the cross-country running race，可以省略从句中的it was，故填scheduled。
37．scheduled
【详解】考查省略，时态和语态。句意：这是一个巨大的成功。约3万名来自不同国家的选手如期参加了比赛。根据句意可知，3万名选手按照被安排的如期参加了比赛，空格处是they were scheduled，as引导的方式状语从句中主语和主句主语一致，且有be动词时，可省略从句中的主语和be动词，因此空格处是scheduled，故填scheduled。
38．detected
【详解】考查状语从句的省略。句意：如果早期发现，许多形式的癌症都可以治愈。分许句子结构，本题考查状语从句的省略。完整的句子为“Many forms of cancer can be cured if they are detected early.”。如果状语从句的主语和主句的主语一致，可以省略状语从句的主语以及be动词。故填detected。
39．accompanied
【详解】考查省略句和过去分词。句意：为了保证安全，孩子们在父母的陪同下可以进入体育场。分析句子可知，此处是when引导的状语从句，从句的主语和主句的主语children一致，可用代词they代替，且由by their parents可知此处是被动语态，时态是一般现在时，此时可省略when从句的主语和be代词，即when (they are) accpmpanied by their parents。故填accompanied。
40．composing
【详解】考查省略句。句意：当他在钢琴上作曲时，他会把铅笔的一端放进嘴里，把另一端靠在琴上，这样他就能感觉到音符了。在when引导的状语从句中，当从句主语和主句主语一致且从句含有be的某种形式时，可省略从句的主语和be，相当于省略了he was。故填composing。
41．setting
【详解】考查状语从句的省略。句意：出发进行长途步行时，一定要穿合适的鞋子。when引导时间状语从句时，如果主从句主语一致且从句谓语有be时，可省略从句的主语和be。完整的从句为when you are setting out on a long walk，省略了you和are。故填setting。
42．to have
【详解】考查状语从句的省略。句意：他打包了必需品，好像要去度假。此处是as if引导的方式状语从句的省略，从句使用虚拟语气，且表示将来的情况，故完整形式是as if he were to have a holiday，当状语从句主语和主句主语一致，且从句含有be动词时，可将从句的主语和be动词省略。故填to have。
43．mentioned
【详解】考查省略句。句意：如前所述，该立法不认为低工资是拒绝工作的可接受理由。在as引导的状语从句中，当从句主语和主句主语一致且从句含有be的某种形式时，可省略从句的主语和be。句中相当于省略了legislation was，保留过去分词mentioned。故填mentioned。
44．exposed
【详解】考查状语从句的省略。句意：工程师们也在尝试开发一种“开关”，当暴露在日光下时，植物的光就会变暗。此处为时间状语从句的省略。在时间状语从句、条件状语从句和让步状语从句中如果从句的主语和主句的主语一致，且从句的谓语动词中又含有be动词的形式时，可以省略从句的主语和be 动词，由句意可知when从句的主语为glow，glow与expose之间是被动关系，此处为客观陈述，应用一般现在时的被动语态is exposed，省略后为when+done的结构。故填exposed。
45．walking
【详解】考查状语从句的省略。句意：沿着小路走，你可以听到鸟儿甜美的歌声。分析可知，逗号前为状语从句的省略，完整的句子为：while you are walking along the paths，从句的主语和主句的主语一致，同时用到了be动词，所以可以省略从句的主语和be动词，故填walking。
46．instructed
【详解】考查状语从句的省略。句意：除非接到指示，否则不要离开大楼。根据句意可知，连词until引导的是一个时间状语从句，其完整的句子应该是until you are instructed to do so.该状语从句符合省略的条件（主句和从句的主语一致；从句主要动词是be的某种形式），这时可以把从句的主语和be动词省略，该句中省略掉you are。故填instructed。
47．printed
【详解】考查状语从句的省略。句意：这本词典一旦印刷，就会很受欢迎。分析句子可知，本句为状语从句的省略，还原为：Once this dictionary is printed，省略了this dictionary is 。故填printed。
48．watching
【详解】考查非谓语动词。句意：奶奶看电视时睡着了。分析句子，设空处与前面的when构成了状语从句的省略结，构即主句主语与从句主语一致，且从句有be时，主语和be动词可以省略。此处watch与句子主语之间构成主动关系，故应用现在分词，完整的从句部分应为：when she was watching TV。故答案是watching。
49．leaving
【详解】考查状语从句中的省略。句意：我离开家时找不到车钥匙了。分析句子可知，句子为“when”引导的时间状语从句，从句主语与主句主语一致，且谓语中包含“be”，此时可省略从句主语和“be”，省略前为“when I was leaving home”，故空格处应用“leave”的现在分词“leaving”。故填leaving。
50．asked
【详解】考查状语从句的省略。句意：如果请他来，他会来的。if引导的条件状语从句，当从句的主语和主句的主语一致，且有be动词时，可以省略从句的主语和be动词。if asked =if he is asked。故填asked。
51．finish
【详解】考查固定搭配。句意：我只能根据一个真实的故事来完成这本书。固定结构：can’t help but do sth.“只得做某事”。故填finish。
52．to say
【详解】考查非谓语动词。句意：他张开嘴唇，好像要说什么。分析句子，as if引导状语从句，此处构成了状语从句的省略结构，say的逻辑主语是he，同时表示将要去做某事。故应该使用to do不定式结构，完整的从句部分为：as if he was to say something。故填to say。
53．breathed
【详解】考查状语从句的省略。句意：工厂里的空气污染严重。如果被吸入，它可能会导致疾病甚至死亡。此处是if引导的条件状语从句的省略，从句主语是it（指代air），和动词breathe之间是被动关系，故完整形式为If it is breathed in，当状语从句的主语和主句主语一致且从句含有be动词时，可将从句主语和be动词省略。故填breathed。
54．published
【详解】考查状语从句的省略。句意：小说和传记、自传、漫画等非小说类作品将于下个月出版。在when, while, if, as if, though(或although), as, until, once, whether, unless, where等连词连接的状语从句中，常省略跟主句相同的主语和be动词。结合句意分析子可知，“when　　　　(publish) next month.”是时间状语从句，原句为“when the novels and non-fiction like biographies, autobiographies and comics are published next month.”，符合状语从句省略条件，省略the novels and non-fiction like biographies, autobiographies and comics are后，应保留过去分词invited。故填published。
55．scheduled
【详解】考查状语从句的省略。句意：为了按时甚至提前完成任务，我们应该加班加点。as scheduled“按照预定时间”是固定表达，是一个省略了的状语从句，原句为as it is scheduled。故填scheduled。
56．respecting
【详解】考查状语从句的省略。句意：让他们知道你在那里以任何可以接受的方式提供帮助，同时仍然尊重你邻居的隐私。在时间状语从句中主句主语与从句主语一致，且从句谓语部分含有be动词，则可以省略从句中的主语和be动词，从句的完整表达为while you are still respecting the privacy of your neighbour省略后为while still respecting the privacy of your neighbour，故填respecting。
57．pressed
【详解】考查省略句。句意：如果被追问，他会承认他知道这件事。if引导的条件状语从句中，主语与谓语构成被动关系，且省略了主语he和be动词，故填pressed。
58．published
【详解】考查省略句。句意：他的作品一经出版，就因每行结尾不押韵而出名。在once引导的状语从句中，当从句主语和主句主语一致且从句含有be的某种形式时，可省略从句的主语和be，省略了his work was。故填published。
59．crossing
【详解】考查现在分词。句意：过马路时你应该小心。分析句子可知，设空处是时间状语从句的省略结构，完整从句应是while you are crossing the road，省略了主语和助动词be，动词cross和逻辑主语you之间是主动关系，应填现在分词。故填crossing。
60．carried
【详解】考查状语从句的省略句。句意：这个实验表明，如果定期进行适量的锻炼，能够改善我们的健康。根据句意可知，从句的主语proper amounts of exercise与carry out是动宾关系，故用被动语态。当主从句的主语一致的情况，且从句谓语的助动词为be动词时，可以省略从句的主语和be动词，句子if carried out可以还原为：if proper amounts of exercise are carried out。故填carried。