专题19 并列连词和状语从句-十年（2012-2021）高考英语真题分项详解（全国通用） 解析版

这是一份专题19 并列连词和状语从句-十年（2012-2021）高考英语真题分项详解（全国通用） 解析版，共18页。

专题19 并列连词和状语从句
【2021年】
1．（2021·天津卷）We all need to get involved in saving energy ________ it's at work, at home, or at school.
A．unless B．once C．whether D．because
【答案】C
【解析】考查状语从句连接词词义辨析。句意：无论是在工作中，在家里，还是在学校，我们都需要参与到节约能源的活动中来。A.unless除非；B.once 一旦；C.whether无论；是否；D.because 因为。分析句子，该空需要一个连词引导让步状语从句，根据句意及后面的or ，需要表示“无论是…还是…”，whether符合题意。故选C项。
2．（2021·天津卷）What puzzles Lily's friends is ________ she always has so many crazy ideas.
A．whether B．why C．what D．when
【答案】B
【解析】考查连接词词义辨析。句意：令Lily的朋友们感到困扰的是她为什么总是有这么多疯狂的想法。A. whether是否；B. why为什么；C. what什么，所…的事儿；D. when什么时间，…的时间。分析句子，该空需要一个表语从句的连接词，结合句意，应该是朋友们不明白Lily 为什么有这么多疯狂的想法。所以本句为why引导的表语从句。故选B项。
3. （2021·全国乙卷短文改错）I love doing housework. I always assist my parents in doing the dishes after meals. I also water the flowers in the yard and tidy up my own bedroom whatever necessary.
【答案】 whatever→whenever
【解析】考查连词。句意：我也给院子里的花浇水，必要时打扫我自己的卧室。根据句意可知，此处表达“有必要时我也会打扫自己的卧室”，所以用whenever(无论何时)引导让步状语从句。故将whatever改为whenever。
4.（2021·浙江1月卷）阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
In a study of 33 years of trends in Body Mass Index (体重指数) across 200 countries, the scientists found that people worldwide are getting heavier 28． that most of the rise is due to gains in BMI in rural areas.
BMI is an internationally recognized measurement tool 29． gives an indication of whether someone is a healthy weight. It is calculated by dividing a 30． (person) weight in kg by their height in meters squared. and a BMI of between 19 and 25 31． (consider) healthy.
The study found that between 1985 and 2017, average rural BMI increased 32． 2. 1 in women and men. In cities, however, the gain 33． (be) 1. 3 in women and 1. 6 in men. The researchers described “striking changes” in the geography of BMI. Tn 1985，urban men and women in more than three quarters of the countries 34． (study) had higher BMIs than men and women in rural areas. But 30 years later, the BMI difference between urban and rural people in many countries had narrowed 35．(sharp).
This may be due to some disadvantages for people 36． (live) in the countryside, including 37． (low) levels of income and education, higher costs of healthy foods, and fewer sports facilities.
【答案】
28．and
29．that/which
【解析】这是一篇说明文。文章介绍了如今世界各地的人体重越来越超标，主要是由于农村地区的体重指数（BMI）增加了，并分析了其中的原因。
28．考查连词。句意：在一项对200个国家33年体重指数趋势的研究中，科学家们发现，世界各地的人们体重越来越重，而这主要是由于农村地区体重指数的增加。分析句子结构可知，that people worldwide are getting heavier和that most of the rise is due to gains in BMI in rural areas.都是found引导的宾语从句，是并列关系，故填and。
29．考查定语从句关系代词。句意：BMI是一种国际公认的测量工具，它可以显示一个人的体重是否健康。分析句子结构可知，tool是先行词，且在从句中做主语，故填that/which。
【2020年】
1.（2020·江苏卷）They decide to have more workers for the project ____ it won’t be delayed.
A. even if B. as if C. now that D. so that
【答案】D
【解析】考查连词辨析。句意：他们决定为这项工程增加工人，以免耽搁。A. even if即使；B. as if好像；C. now that既然；D. so that为了。空后it won’t be delayed是前面采取措施的目的，应使用so that引导目的状语从句。故选D。
【2019年】
1.【2019·江苏卷】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
【答案】D
【解析】考查状语从句的连词。句意：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要是…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。
2.【2019·天津卷】Tom is so independent that he never asks his parents' opinion _________ he wants their support.
A. since B. once
C. unless D. after
【答案】C
【解析】考查连词辨析。句意：汤姆是如此独立，以至于他从来不征求父母的意见，除非他想得到他们的支持。since因为；once一旦；unless除非；after在……之后，根据题意，故选C。
3.【2019·新课标I卷】Suddenly football feel just in front of me but almost hit me.
【答案】 Suddenly football fell just in front of me almost hit me.
【解析】考查冠词。名词football为可数名词，前边需要有限定词。这里football第一次出现，故在football前加a；考查连词。句意：突然一个足球落在我前边并且差点打到我。“足球落下来”与“打到我”两个动作是顺承关系，不是转折关系。故将but改为and。
4.【2019·新课标II卷】I don't see any reason to give up work. I love coming here and seeing my family and all the friends I have made_(make) over the years. I work not because I have to, ___67___ because I want to.”
【答案】but
【解析】考查并列连词。根据句意逻辑可知，此处为转折关系，句意：我工作不是因为我不得不做，而是因为我想做。此处用but与前文not 呼应，构成“不是……而是 ……”之意，故填but。
5.【2019·新课标III卷】On our way to the house，it was raining ___61___ hard that we couldn't help wondering how long it would take to get (get)there. It was in the middle of Pearl City.
【答案】so
【解析】考查副词。句意：在我们去那座房子的路上，雨下得如此大以至于我们不能不想还要多久才能到达那里。“so…that…”意为“如此……以至于……”，引导结果状语从句。故填so。
【2018年】
1.【2018·江苏】_______ 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
【答案】B
【解析】考查连词词义辨析及语境理解。句意：除非你睡得好，否则一两个晚上之后，你会失去专注、计划和保持动力的能力。A. Once一旦；B. Unless除非；C. If如果；D. When当……时候。故选B。
2.【2018·天津】 Let's not pick these peaches until this weekend ___________they get sweet enough to be eaten.
A. ever since B. as if C. even though D. so that
【答案】D
【解析】考查连词短语词义辨析及语境理解。句意：让我们这个周末再摘这些桃子，这样的话，它们吃起来就变得足够的甜。A.ever since自那时起；B.as if好像；C.even though尽管；D.so that以便。从句为目的状语从句，故用sothat引导。故选D。
3.【2018·北京】_________ we don’t stop climate change, many animals and plants in the world will be gone.
A. Although B. While C. If D. Until
【答案】C
【解析】考查状语从句。句意：如果我们不阻止气候变化，那么世界上的很多动植物都将会消失。动植物不灭绝的前提条件是阻止气候变化。although尽管；while当……时候，尽管，然而；if如果；until直到。故C选项正确。
【2017年】
1.【2017·北京】If you don’t understand something, you may research, study, and talk to other people _______ you figure it out.
A. because B. though C. until D. since
【答案】C
【解析】A.because因为；B.though尽管；C.until直到；D.since目从。如果你无法理解某个东西，你可能会去研究，学习和他人探讨直到你解决为止，根据句意可知选用until，直到，选C。
2.【2017·北京】______ birds use their feathers for flight, some of their feathers are for other purposes.
A. Once B. If C. Although D. Because
【答案】C
【解析】A.Once 一旦；B.If 如果；C.Although尽管；D.Because因为。句意：尽管鸟儿们用羽毛来飞翔，但是他们的一些羽毛还有其他用途。根据语境可知前后之间是让步关系，故选C。
3.【2017·北京】—Peter, please send us postcards ______ we’ll know where you have visited.
—No problem.
A. but B. or C. for D. so
【答案】D
【解析】A. but 但是 B. or 或者 C. for 因为 D. so因此 句意： Peter，请给我们寄明信片，因此我们就会知道你们去哪游览过，根据语境可知前后句之间是因果关系，故用so，选D。
4.【2017· 江苏】Located _______ the Belt meets the Road, Jiangsu will contribute more to the Belt and Road construction.
A. why B. when C. which D. where
【答案】D
【解析】考查状语从句。be located in+地点名词，位于坐落某地，where引导的地点状语从句在此相当于in some place，故选D。句意：位于丝绸之路交汇处的江苏省将会对“一带一路”的建设做出更大的贡献。
【2016年】
1.【2016·北京】My grandfather still plays tennis now and then, ________ he’s in his nineties.
A. as long as B. as if C. even though D. in case
【答案】C
【解析】题目考查状语从句。句意：即使是九十多岁了，我的爷爷仍然时不时地打打网球。A.as long as只要，引导条件句；B.as if似乎，引导方式状语从句或表语从句；C. even though即使，引导让步状语从句；D.in case以防，引导目的状语从句。这里是转折关系，故选C。
2.【2016·北京】I am not afraid of tomorrow, ________ I have seen yesterday and I love today.
A. so B. and C. for D. but
【答案】C
【解析】题目考查并列连词。句意：我不害怕明天，因为我已经经历了昨天并且深爱着今天。so后跟结果；and表并列关系；for补充说明原因；but表转折。故选C。
3.【2016·江苏】______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
【答案】D
【解析】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。
4.【2016·天津】 ______ 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
【答案】C
【解析】句意：随着人口平均年龄的增长，越来越多的老人要照顾。untess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。
5.【2016·浙江】_______online shopping has changed our life , not all of its effects have been positive.
A. Since B. After C. While D. Unless
【答案】C
【解析】句意：尽管网上购物已经改变了我们的生活，单数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。
6.【2016·北京】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
【答案】A
【解析】题目考查原因状语从句。句意：我非常喜欢听音乐，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。
【2015年】
1.(2015﹒北京)He is a shy man,___he is not afraid of anything or anyone.
A.so B. but C.or D. as
【答案】B
【解析】句意：他是一个害羞的人，但是他并不害怕任何事和任何人。A. so因此；B. but但是；C. or或者；D. as作为。根据句意，前后句表示转折，因此选择but。
2.(2015﹒湖南)Video games can be a poor influence if ________ in the wrong hands.
A. to leave B. leaving C. leave D. left
【答案】D
【解析】用作状语的从句叫状语从句。状语从句可置于句首、句末或句中，-般来说，状语从句都比较完整。但是，在-一些状语从句中存在的省略问题，可以归纳为以下两点:1.when,while,if as if although\though as,until, once,whether,unless,where等引导的从句中,如果其谓语为be ,而主语与主句的主语相同时,则从句的主语和be可省略。有时从句的主语为in时，也可省略it或从句中的有关成分。2.than,as,no matter what\who等后面成分的省略。句意:如果电子游戏落入一个错误的人手中就能够产生一个不良影响。
3. (2015﹒北京)You won’t find paper cutting difficult _____you keep practicing it.
A. even if B. as long as C .as if D. ever since
【答案】B
【解析】句意：只要你不断练习，你不会觉得剪纸很难。A. even though即使，虽然;B. as long as只要；C. as if犹如，好像；D. ever since自从。结合句意，故选B。
4.(2015﹒北京) _____the damage is done, it will take many years for the farmland to recover.
A. Until B. Unless C. Once D. Although
【答案】C
【解析】句意:一旦农田被毁坏，将需要许多年的时间才能得以恢复。A unti1 译为到...为止，直到....才，...以前; B. unless译为如果不，除非; C. once译为一旦，一 经..... :便; D. although译为虽然，然而，尽管。结合句意，故选C
5.(2015﹒重庆)If you miss this chance, it may be years ____ you get another one.
A.as B. before C. since D. after
【答案】B
【解析】 As 因为了 before之前；since由于；after之后； 句意：如果你错过这次机会，可能要等一的才会再有。It be 时间段 before ..表示要。。多么才会。。，故选B项。
6.(2015﹒浙江) a single world can change the meaning of a sentence, a single sentence can change the meaning of a paragraph.
A. Just as B. Even though C. Until D. Unless
【答案】A
【解析】句意：正如一个单词可以改变句子的意思那样，一个句子也能够改变一个段落的意思。A意为正如， B意为尽管，用于让步状语从句， C意为直到， D意为除非。分析逗号前后表达所使用的结构句式是相同的：world 对应 sentence, a sentence 对应 paragraph. 这正好是一种对应，也就是正如的关系，此外，如果把BCD选项代入进去翻译，可以发现这种翻译是不正确的。所以答案是选A。
7.(2015﹒天津) We need to get to the root of the problem______ we can solve it.
A. while B. after C. before D. as
【答案】C
【解析】句意：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。
8.(2015﹒四川)There is only one more day to go your favorite music group play live.
A. since B. until C. when D. before
【答案】D
【解析】考查连词。选项A意为自从；选项B意为直到；选项C意为当…时；选项D意为在…之前。此题前一分句意为：还有一天；后一分句意为：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将会现场演奏。
9.(2015﹒陕西)I believe you will have a wonderful time here you get to know everyone else.
A. though B. as if C. once D. so that
【答案】C
【解析】句意：我相信一旦你了解这里的每个人，你将玩得很愉快。though虽然；as if好像；once一旦；so that为了。所以选C。
10.(2015﹒福建)_________the students came from different countries, they got along quite well in the summer camp.
A. While B. Unless C. Since D. Until
【答案】A
【解析】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，他们在夏令营里面都相处得很好。故选A
11.(2015﹒江苏)It is so cold that you can’t go outside _____ fully covered in thick clothes.
A. if B. unless C. once D. when
【答案】B
【解析】句意:外面太冷了，你不要出去,除非用厚衣服完全裏起来。A项“如果”; B项“除非; C项“一旦”; D项....时候”。“unless fully covered”为连词+省略结构”，补充完整为“unless you are"。故选B项。“连词+省略结构省略了从句的主语(与主句主语一致)和主语后的动词be。考生应根据前后句意判断出前后逻辑关系，然后选择正确答案。同时,考生要注意归纳这类连词: when. while表示时间; if unless"表示条件”，once' 表示时间或条件; though although, even if(though)表示“ 让步”。
12.(2015﹒安徽)______ he once felt like giving up, he now has the determination to push further and keep on going.
A. Where B. As C. In case D. Now that
【答案】A
【解析】句意：曾经让他感到想放弃的地方，现在他决心继续前进。A那里；B尽管，当，因为，随着；C以防；D既然。where表示地点，引导让步状语从句；as引导让步状语从句常用倒装，即tried as he has；in case表目的；now that表原因。这里指让他感到想放弃的地方，故选A。
13.(2015﹒安徽)______ scientists have learned a lot about the universe, there is much we still don't know.
A. Once B. Since C. Though D. Unless
【答案】C
【解析】句意：虽然科学家已经了解到很多有关宇宙的知识，但是，我们仍然不知道的还有很多。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。这里是转折含义，故选C。
14.(2015﹒湖南)________ the job takes a significant amount of time, most students agree that the experience is worth it.
A. If only B. After C.Although D.In case
【答案】C 　
【解析】考查状语从句。句意：尽管这项工作需要占用大量的时间，但是大部分学生还是认为(从工作中获得的)这些经验还是值得的。根据句意可知，主从句构成让步关系。故选C。
【2014年】
1.(2014﹒北京)Some animals carry seeds from one place to another, ______ plants can spread to new places.
A. so B. or C. for D. but
【答案】A
【解析】So于是（强调上下文因果关系）；or或者；for由于，因为（起补充说明作用）;but但是（表示转折）；句意：一些动物把种子从一个地方带到另外一个地方，于是植物就传播到了新的地方生长了。上下文之间是因果关系。故A正确。
2.(2014﹒安徽)The meaning of the word “nice” changed a few times ________ it finally came to include the sense “pleasant”.
A.before B.after
C.since D.while
【答案】A
【解析】根据finally可知，从句谓语动词的动作后于主句的谓语动词的动作而发生，据此可排除B和C，while引导时间状语从句时，表示主句和从句谓语动词的动作同时发生。句意：“nice”一词的含义变化了数次，直到最后它才包括了“pleasant”的含义。故选A。
3.(2014﹒北京)________ the forest park is far away, a lot of tourists visit it every year.
A.As B.When
C.Even though D.In case
【答案】C
【解析】句意：即使(尽管)那个森林公园很远，每年还是有很多人去参观。even though 意为“即使，尽管”，引导让步状语从句；in case引导目的状语从句。故选C。
4.(2014﹒湖南)You will never gain success________you are fully devoted to your work.
A. when B. because
C. after D. unless
【答案】D
【解析】句意：如果你不是全身心地投入到工作中去，你永远不可能获得成功。此处unless相当于if not，表示含有否定意义的条件。
5.(2014﹒江苏)Lessons can be learned to face the future, ________ history cannot be changed.
A.though B.As C.since D.unless
【答案】A　
【解析】句意：尽管历史不可能被改变，但是我们可以吸取教训来迎接未来。根据语境可知此处用though引导让步状语从句，故A项正确。
6.(2014﹒江西)It was the middle of the night ________ my father woke me up and told me to watch the football game.
A. that B. as C. which D. when
【答案】D
【解析】句意：当我父亲叫醒我，告诉我看球赛的时候是半夜。when在此引导时间状语从句。此题易误选A项，原因是把此句看成了强调句型，要注意分析句子成分。
7.(2014﹒陕西)The young couple, who returned my lost wallet, left ________ I could ask for their names.
A. while B. before C. after D. since
【答案】B
【解析】句意：那对归还了我钱包的年轻夫妻在我询问他们的姓名之前已经离开了。所填词引导时间状语从句，意思是“在……之前”，故选B。
8.(2014﹒四川)I'll be out for some time. ________ anything important happens, call me up immediately.
A. In case B. As if C. Even though D. Now that
【答案】A　
【解析】in case万一，以防；as if好像；even though即使；now that既然，由于。句意：我要出去一会儿。万一发生了什么重要的事情，马上给我打电话。根据句意可知选A项。
9.(2014﹒天津)________ you start eating in a healthier way, weight control will become much easier.
A. Unless B. Although C. Before D. Once
【答案】D　
【解析】unless 如果不，除非，引导条件状语从句；although虽然，尽管，引导让步状语从句；before 以前，引导时间状语从句；once一旦，引导时间状语从句。句意：一旦你开始用健康的方式吃饭，体重控制将会变得容易多了。
10.(2014﹒浙江)Cathy had quit her job when her son was born ________ she could stay home and raise her family.
A.now that B.as if C.only if D.so that
【答案】D　
【解析】句意：凯西在她儿子出生的时候就辞去了工作，这样她就能在家里照顾家人了。根据句意知，此处是so that引导的目的状语从句，同时由从句中的could也可以推断出应该选so that。now that既然；as if似乎；only if只要。
11.(2014﹒重庆)Half an hour later, Lucy still couldn't get a taxi ________ the bus had dropped her.
A. until B. when C. although D. where
【答案】D　
【解析】主句“Lucy couldn't get a taxi…”和从句“…the bus had dropped her.”均需要地点状语。故选D。
【2013年】
1.(2013﹒江苏)In the global economy, a new drug for cancer, ______ it is discovered, will create many economic possibilities around the world.
A. whatever B. whoever C. wherever D. whichever
【答案】C
【解析】在状语从句_____ it is discovered中，不缺少任何主要成分，所以引导词只能在从句中作状语，只可以选择副词性质的，所以答案很明显，选C。
2.(2013﹒辽宁)One can always manage to do more things, no matter____ full one’s schedule is in life.
A. how B. what C. when D. where
【答案】A
【解析】让步状语从句中，no matter how=however。根据how+adj./adv.的原则，本题中full是形容词，所以选择A。
3.(2013﹒湖南)You must learn to consult your feelings and your reason _____ you reach any decision.
A. although B. before C. because D. unless
【答案】B
【解析】解题思路：理清逻辑关系。对比reach any decision 和consult your feelings and your reason关系，不难看出，兼顾好情感与理智在前，做任何决定在后。
4.(2013﹒江西)She says that she’ll have to close the shop _____ business improves.
A. if B. unless C. after D. when
【答案】B.
【解析】A.如果；B.如果不；除非；；C.在……之后；D.当……时候。句意为她说如果生意没有好转的话，她将不得不关掉这个商店。
5.(2013﹒陕西)I have heard a lot of good things about you _____ I came back from abroad.
A. until B. since C. when D. before
【答案】A
【解析】现在完成时态的其中一个用法是表示一个动作“从过去的某个时候发生，一直延续到现在”，从本句中的主句是现在完成时，从句是一般过去时来看，整个句子表达的正是这样的一个动作，故连词用since；如果用until或者before，则主句表示的动作都是发生在从句之前，都应该用过去完成时，排除B，C；如果用when，则主句应该用一般过去时，排除D。
6. (2013﹒上海)They promised to develop a software package by the end of this year, ______ they might have.
A. however difficult B. how difficult
C. whatever difficulty D. what difficulty
【答案】C
【解析】题干的意思是：“他们承诺，无论可能有什么困难，到今年底都要开发出一个软件包”。本题是一个主从复合句，由句意“无论”可知是让步状语从句，从而排除选项B，D。从句中的关键词是实义动词have，用还原法，可知是短语have difficulty，所以从句为whatever difficulty they might have。如果选B，则从句要改为：however difficult it might be。
7.(2013﹒上海)I cannot hear the professor clearly as there is too much noise _____ I am sitting.
A. before B. until C. unless D. where
【答案】D
【解析】本题四个选项都为常见状语从句引导词，A. before引导时间状语从句，“在……之前”；B. until引导时间状语从句，“直到……为止”；C. unless引导条件状语从句，“除非……，如果不……”；D. where引导地点状语从句，“在……的地方”。
8.(2013﹒四川)He is so busy. He cannot afford enough time with his son _____ he wants to.
A. even if B. as if C. because D. before
【答案】A
【解析】句子的前段说他不能腾出时间，后段说他想，前后之间明显是让步关系，“即使想，也不能”，故正确答案是even if。其他三个选项的意思分别是好像，因为，在……之前，均不合句意，排除。
9.(2013﹒新课标I)There’s no way of knowing why one man makes an important discovery _____ another man, also intelligent, fails.
A. since B: if C. as D. while
【答案】D
【解析】四个选项都可以作从属连词使用，引导状语从句。since引导时间状语从句，意思是“自……以来”；引导原因状语从句，意思是“既然；因为”。if引导条件状语从句，意思是“如果”。as 引导时间、原因、方式、比较等状语从句，意思是“当……的时候；随着……；因为……；像……；和……”等。while引导时间状语从句，意思是“当……的时候”。此外，while还可作并列连词，表示转折和对比，意思是“然而”，显然符合句意的是选项D。
10.(2013﹒天津) _____ small, the company has about 1,000 buyers in over 30 countries.
A. As B. If C. Although D. Once
【答案】C
【解析】although做连词意为“尽管，虽然”，符合前后的让步的逻辑关系；实际上，本句省略了主语和系动词it is。
11.(2013﹒重庆)______we have enough evidence, we can't win the case.
A. Once B. As long as C. Unless D. Since
【答案】C
【解析】“我们有足够的证据”和“我们不能赢得这个案子”之间的关系有可能是两种：（1）让步关系；（2）否定前面的意思。四个选项中，没有表让步关系的although/though,，那么答案就应该是否定前面的意思，用unless，“如果我们没有……，我们就不能……”；其他三个连词明显与句意不符，排除。
12.(2013﹒北京﹒T22)Don’t turn off the computer before closing all programs you could have problems.
A. or B. and C. but D. so
【答案】A
【解析】前面说的是别关电脑，后面说的是关电脑的后果，很显然，中间的意思是“如果关电脑”，如果用一个连词，那就应该用or或者otherwise，因此锁定答案。句意为在关闭所有程序之间不要关电脑，否则可能会出问题。
13.(2013﹒新课标II)I was glad to meet Jenny again, _____ I didn't want to spend all day with her
A. but B. and C. so D. or
【答案】A
【解析】解题关键是弄清前后句子之间的逻辑关系。前面说见面高兴，后面却说不想整天跟她呆在一起，明显是转折关系，要用连词but。句意为我很高兴再次见到詹尼，但是，我不想一整天都跟她一起度过。
14.(2013﹒四川) Read this story, _____ you will realize that not everything can be bought with money.
A. or B. and C. but D. so
【答案】 B
【解析】“祈使句，+ and/then + 从句”是一个固定句式，意思是“做某事，你就会如何”。“祈使句+or+从句”意为“做某事，否则你就会如何”。句意为看看这个故事，你就会明白不是所有的东西都可以用钱买到的。
15.(2013﹒重庆)It's not easy to change habits, ______ with awareness and self-control, it is possible.
A.for B.or C.but D. so
【答案】 C
【解析】空处前面说的是不容易，后面说的是可能，显然是转折关系。句意为改变习惯不容易，但如果是有意识的并且自控，就可能做到。
16. (2013﹒安徽)It’s much easier to make friends ______ you have similar interests.
A. unless B. when C. even though D. so that
【答案】B
【解析】本题可以把四个选项分别放到空处，其中只有选项B能使语意通顺，为正确答案；其他三个选项的意思分别是“除非”，“即使”，“以便”，都不合乎句意，排除。
17. (2013﹒北京)I took my driving license with me on holiday, ______ I wanted to hire a car.
A. in case B. even if C. ever since D. if only
【答案】A
【解析】本题的解题关键是弄清“我带驾照”跟“租车之间”之间的逻辑关系，这样正确答案就很容易锁定了。句意为度假时我带了驾照，以防我要租车。
【2012年】
1.(2012﹒陕西)All the photographs in this book, _______ stated otherwise, date from the 1950s.
A. unless B. until C. once D. if
【答案】A
【解析】题干意思是：除过被标明的以外，书中其余所有的图片都可以追溯到20世纪50年代。所填词表条件，从句用了省略句，引导词意思是：除非，如果不，选A。
2.(2012﹒北京)—Look at those clouds!
—Don’t worry. ______ it rains, we’ll still have a great time.
A. Even if B.As though C. In case D. If only
【答案】A
【解析】even if 即便，as though似乎，in case 以防，if only要是…多好。
3.(2012﹒全国卷II)I had hardly got to the office ______ my wife phoned me to go back home at once.
A. when B. than C. until D. after
【答案】A
【解析】此题较易。只要辨认出固定句型hardly. . .when . . .问题即刻解决。句意：我刚到办公室，我妻子就给我打电话让我立刻回家。
4.(2012﹒全国卷I) I don't believe we've met before, I must say you do look familiar.
A. therefore B. although
C. since D. unless
【答案】B
【解析】句意：尽管我一定说你确实看起来熟悉，但我相信我们以前没见过面。根据句意只有although符合题意。
5.(2012﹒江苏9)— Thank God you're safe!
—I stepped back, just to avoid the racing car.
A. in time B. in case C. in need D. in vain
【答案】A
【解析】in time意为“及时”，in case意为“万一，假使”；in need意为“需要”；in vain意为“徒劳，无济于事”。句意为：——谢天谢地，你是安全的！——我走回去，正好避免赛车。符合题意。
6. (2012﹒湖北)The furniture, with its modern style and bright colors, suits modern houses and their gardens, but looks _______ in the garden of a traditional home
A. out of question B. out of order C. out of sight D. out of place
【答案】D
【解析】句意为：这套家具款式新潮，色泽明丽，与新式房屋和花园配套，但看起来与传统的房子和花园不相称。D项意为“与……不相称”，符合句意。A项意为“毫无疑问”，B项意为“次序颠倒”，C项意为“看不见”，都与句意不符。
7.(2012﹒重庆—Coach, can I continue with the training?
—Sorry, you can’t ______you haven’t recovered from the knee injury.
A. until B. before C. to consider D. unless
【答案】 C
【解析】短语语境表示“抱歉，你不能继续训练因为你膝盖受的伤还没有恢复。”由此可知，空白处后面为原因状语从句，C选项符合题意。因此，正确答案为C选项。
8.(2012﹒山东)A number of high buildings have arisen _______ there was nothing a year ago but ruins.
A. when B. where C. before D. until
【答案】B
【解析】此处是where引导地点状语从句，表示“在……地方”。 句意：很多高楼在一年前还是废墟的地方矗立起来了。
9. (2012﹒山东)He smiled politely ______ Mary apologized for her drunken friends.
A. as B. if C. unless D. though
【答案】A
【解析】此处是as引导这个时间状语从句，这里smile和apologize同时进行，as意为：当…的时候。句意：当玛丽为她喝醉了朋友道歉时，他礼貌地微笑着。
10. (2012﹒福建)It is hard for the Greek government to get over the present difficulties_________ gets more financial support from the European Union.
A. If B. unless C. because D. since
【答案】B
【解析】根据句意可知“除非有来自欧洲联盟的更多的经济支持，否则希腊政府很难克服目前的困难”，只能选择unless“除非”才能使句意完整。考查状语从句的连词题事实上非常简单，只要找到句中的关键词，然后从句意上去排除就行了，本题关键词是hard和more financial support。
11. (2012﹒江西)You can borrow my car you promise not to drive too fast.
A.unless B.even if C.in case D.as lone as
【答案】D
【解析】句意为只要你保证不开得太快，你就可以把我的车借走。A.unless除非，B.even if即使，C.in case以防万一，D.as long as只要。选D。
12.(2012﹒辽宁)Leave your key with your neighbor you lock yourself out one day.
A. as long as B. even though C. in case D. as if
【答案】C
【解析】A项意为“只要”；B项意为“尽管”；C项意为“以防”；D项意为“好像”。根据句意：把你的钥匙留给你的邻居，以防你把自己锁在外面了。所以选C项。
13. (2012﹒四川)If you happen to get lost in the wild, you’d better stay ______ you are and wait for help.
A. why B. where C. who D. what
【答案】B
【解析】where引导的地点状语表明主句动作发生的地点，即：你最好呆在你现在所在的地方。故选B。
14.(2012﹒陕西)Hot _______the night air was, we slept deeply because we were so tired after the long journey.
A. although B. as C. while D. however
【答案】B
【解析】hot是做从句的表语，提前说明从句时倒装，即as引导的让步状语从句中，要将从句中的表语，状语，或动词原形提到as之前，故选B。