1.(2015·北京，25改编)He is a shy man，________he is not afraid of anything or anyone.
答案：but but用来连接并列但语义对比的两个句子。句意：他是个腼腆的人，但他并不怕任何事或任何人。
2.(2015·北京，32改编)________the damage is done, it will take many years for the farmland to recover.
答案：Once once一旦。句意：一旦造成损害，土地要好多年才能恢复。
3.(2015·天津，12改编)We need to get to the root of the problem________we can solve it.
答案：before 本题考查状语从句的连词。before表示“主句发生在从句之前”。句意：在我们解决问题之前，我们需要找到问题的根源。
4.(2015·陕西，20改编)I believe you will have a wonderful time here ________you get to know everyone else.
答案：once once“一旦”，引导条件状语从句。句意：你一旦认识了这儿的任何别的人，我相信你会在这儿玩得很愉快。
5.(2015·安徽，23改编)________ scientists have learned a lot about the universe，there is much we still don't know.
答案：Though/Although/While 句意：虽然科学家对宇宙已经了解了很多，但仍有很多东西是我们不知道的。though/although/while虽然，尽管。
6.(2015·湖南，33改编)________the job takes a significant amount of time，most students agree that the experience is worth it.
答案：Although/Though although/though虽然(表示“虽然”时，不在后面使用连词but，不过有时它可与yet，still，nevertheless等副词连用)。句意：虽然那个工作要花大量的时间，但是大多数学生都觉得这次经历是值得的。
7.(2015·湖南，35改编)That's why I help brighten people's days.If you________，who's to say that another person will?
答案：don't 考查if引导的条件状语从句。在if引导的条件状语从句中，如果从句谈论的是一个有可能发生的事实及其产生的相关的结果，主句用一般将来时态，从句用一般现在时态。此句中的who's to say that another person will用的是将来时，故if引导的条件状语从句要用一般现在时。句意：这就是为什么我要使人们的日子变得鲜活起来。如果你不这样做，你说谁会这样做?
8.(2015·四川，6改编)There is only one more day to go ________your favorite music group play live.
答案：before before意为“在……之前”。句意：离你最喜欢的乐队的现场演奏只剩下一天了。
9.(2015·重庆，4改编)If you miss this chance，it may be years ______ you get another one.
答案：before It be+时间段+before...“要过……才会……”。句意：如果你错过这次机会，可能要等很多年才会再有另一个机会。
10.(2015·江苏，26改编)It is so cold that you can't go outside________fully covered in thick clothes.
答案：unless 本题考查状语从句引导词及状语从句的省略。句意：天如此冷以至于你除非完全包裹着厚衣服，否则不能外出。unless除非。unless从句中省略主语you及系动词are。
11.(2015·福建龙岩检测改编) It's a motto that we should never remember the benefit we have offered ________ forget the favor received.
答案：nor 句意为：我们应当永远不要记挂我们所给予的好处也不要忘记我们所受的恩惠。这是一则座右铭。nor为表示否定含义的并列词，never...nor...表示“既不……也不……”。
12.(2015·安徽黄山检测改编)Ask any Chinese which city in China is famous for ice and snow, ________ the answer is sure to be Harbin.
答案：and 句意为：(如果)你问任何一个中国人中国的哪座城市因冰雪而出名，答案一定是哈尔滨。此处为“祈使句+and/or+陈述句”的结构，两个分句之间为顺承关系，故填and。
13.(2015·重庆巴蜀中学第四次月考改编)Stick to what you think is right, ________ you will gain a surprising happy ending.
答案：and 句意为：坚持你认为正确的，你会拥有一个幸福的结局。此处为“祈使句+and/or+陈述句”的结构，两个分句之间为顺承关系，故填and。
14.(2015·湖南长郡中学月考改编)—Can I lie about seeing a text message because I was too busy or lazy to respond to it?
—Receiving a text message does not necessarily mean you have to respond. Why waste a perfectly good lie ________ the truth will serve?
答案：when 句意为：——当我很累或懒得去答复时，我可以撒谎说没看过短信吗?——收到短信并不一定意味着必须回复。为什么非得滥用一个精心编造的谎言而不去说实话呢?对比分析主从句谓语的动作可知是同时发生，因此用时间状语连词when表示“当……时候”。
15.(2015·安徽合肥一模改编)Though it has been one year ________ he came to the city, he knows every street here like the back of his hand.
答案：since 句意为：尽管他来这座城市仅仅一年，但是他对这儿的每条街道了如指掌。本题考查固定句型“it has been+时间段+since...”，表示“自从……已经多久了”。
16.(2015·福建福州三中期中改编)—What did he think of the trip to Beijing last month?
—He had such a good time ________ he visited the Great Wall.
答案：when 句意为：——他认为上个月的北京之行怎么样?——当他去参观长城时玩得很开心。设空处引导时间状语从句，表示“当……时候”，故填when。本题容易误用成“such...that...”结构。
17.(2015·安徽淮南一模改编)Little ________ he knew about classical music, he pretended to be an expert on it.
答案：as/though 句意为：尽管他对古典音乐了解很少，但他假装对此是名专家。分析句意及句子结构可知，设空处所在分句为让步状语从句，且否定词little位于句首，应用倒装结构，故填as或though。although也表“尽管”，但其引导的从句要用正常语序，故不填。
18.(2015·安徽蚌埠一模改编)People in Dali are very friendly and honest to you ________ you are a foreigner or just a local.
答案：whether 句意为：大理的人对你很诚实而友好，无论你是外地人还是当地居民。whether...or...表示“无论是……还是……”，引导让步状语从句。
19.(2015·四川雅安中学模拟改编)You can smoke here ________ you leave a window open to let the smoke out.
答案：if 句意为：如果你留一扇窗户使烟散发出去，你就可以在这里吸烟。根据句意可知，此处为条件状语从句，表示“如果”，故填if。
20.(2015·浙江，9改编)Just________ a single word can change the meaning of a sentence，a single sentence can change the meaning of a paragraph.
答案：as 句意为：正如单独一个词能改变一个句子的含义一样，一个独立的句子也能改变一个段落的含义。just as意为“正如，正像”，符合句意。
二、单句改错
1.(2015·辽师大附中期中)But no sooner had I left when the bus arrived.
答案：when改为than no sooner...than...“刚……就……”，是固定用法。
2.(2015·辽宁沈阳二中期中)The people's life here has become rich or colorful.
答案：or改为and 此处表示“生活丰富多彩”，rich与colorful是并列关系，且本句是肯定句，故连词用and。
3.(2015·宁夏银川一中月考)I called my parents, so I did not tell them what had happened.
答案：so改为but 由called与did not tell...的对比判断连词用but。表示“我给父母打电话了，但是没有告诉他们发生了什么”。
4.(2015·拉萨中学月考)It isn't very cold, but you needn't bring many clothes with you.
答案：but改为so 天不太冷“所以”没有必要带很多衣服，连词用so，表示结果。
5.(2015·吉林实验中学三检)It may be popular, and you may also get others confused.
答案：and改为but 由“get others confused”判断连词用but，表示“可能会受欢迎，但是也会让别人很困惑”。
6.(2015·四川)In fact, I don't like to go anymore, so I'm afraid I'll lose their friendship.
答案：so改为but 作者不喜欢再去那里，“但是”又害怕失去他们的友谊，此处表示转折，因此要用but。
7.(2015·山西省太原一模)I'm sure that until we keep on practising, it will be easy for us to learn spokenEnglish well.
答案：until改为if 此处表示“如果我们不断地练习，学好英语口语对我们来说就会很容易”，所以用连词if引导一个条件状语从句。
8.(2015·江西南昌二模) One day, I was cooking in the kitchen as the telephone rang.
答案：as改为when be doing...when...“正在做某事，这时……”，是固定句式。
9.(2015·桂林中学月考)Charles Rolls, a car maker, wasvery interested in Royce's car, but soon Rolls andRoyce went into business together.
答案：but改为and “很快他们就合作了”是顺承前一句所说的事情发生的，故连词用and。
10.(2015·河北七校联考)Work hard, you will makemuch progress and realize your dream.
答案：you前加and 本句是“祈使句+and+陈述句”句式，表示“做……，那么你就会……”。
