A．单句填空
1．We need to get to the root of the problem ________ we can solve it.
答案 before [句意：在能够解决这个问题之前，我们需要找到它的根源所在。根据句意可知用before。]
2．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：正如一个词可以改变一个句子的意思一样，一个句子可以改变一个段落的意思。根据句意可知用as。]
3．________ scientists have learned a lot about the universe, there is much we still don't know.
答案 Although/Though/While [句意：虽然科学家已经了解了很多有关宇宙的东西，但是还有很多我们不知道的。根据句意可知填Although/Though/While。]
4．________ he once felt like giving up, he now has the determination to push further and keep on going.
答案 Where [句意：在他曾经想要放弃的地方，他现在有决心进一步推进并且坚持下去了。根据句意可知用Where。]
5．________ the students came from different countries, they got along quite well in the summer camp.
答案 Although/Though/While [句意：虽然这些学生来自不同的国家，但他们在这个夏令营中相处得很好。根据句意可知用Although/Though/While。]
6．In fact, ________ Tiffany Two celebrated her 27th birthday back in March, she had lived the equivalent (等量) of 125 human years.
答案 when [句意：事实上，当Tiffany Two 在三月份庆祝她27岁生日时，她已经活了相当于人类的125年了。故填连词when引导时间状语从句。]
7．Linda was quite sure that she was going to miss her train ________ she was not very far from the station.
答案 though/although [句意：虽然琳达离火车站不是非常远，但是她非常肯定她会错过她的火车。though/although意为“虽然”。]
8．On our last hike, we were told to take a rest ________ we felt tired.
答案 when [句意：在上次远足中，我们被告知感到累了就歇一歇。when意为“当……时”。]
9．Any measure of an ad's performance is entirely pointless ________ it could be viewed by a person.
答案 unless [句意：如果没人看，广告的任何表现形式都是完全没有意义的。考查条件状语从句。根据句意填unless。]
10．It took what seemed to be years ________ the actress finally turned up, which made the journalists as well as audiences disappointed and angry.
答案 before [句意：似乎用了好几年的时间这位女演员才最终出现，这使得记者和观众既失望 又气愤。考查时间状语从句。根据句型it takes/took some time before...，可知填before。]
B．单句改错
1．Unless the damage is done, it will take many years for the farmland to recover.
________________________________________________________
答案 Unless→If/Once [根据句意可知此处表示“如果；一旦”，故用If/Once。]
2．It is so cold that you can 't go outside if fully covered in thick clothes.
________________________________________________________
答案 if→unless [根据句意可知此处表示“除非”，故用unless。]
3．There is only one more day to go after your favorite music group play live.
________________________________________________________
答案 after→before [根据语意可知是之前，故用before。]
4．If you miss this chance, it may be years since you get another one.
________________________________________________________
答案 since→before [此处为固定结构It may be＋段时间＋before...。]
5．It was the middle of night before my father woke me up and told me to watch the football game.
________________________________________________________
答案 before→when [根据句意可知，此处表示“当……的时候”。]
6．Actually, the London Olympic Park is built wherever there used to be a poor area called East London.
________________________________________________________
答案 wherever→where [根据句意可知，此处表示“……的地方”，故用where。]
7．Such long as he works hard, I don't mind when he finishes the experiment.
________________________________________________________
答案 Such→So/As [so/as long as是固定结构，意为“只要”。]
8．Misunderstandings arising from lack of social communication, if handled properly, may lead to serious problems.
________________________________________________________
答案 if→unless [根据语境可知，此处表示“除非，如果不”，故用unless。]
9．When advertisements are of great help, I don't think we should entirely rely on them.
________________________________________________________
答案 When→While/Although/Though [根据语境可知，此处表示“尽管”。]
10．We need some more facts and figures after we make the final decision.
________________________________________________________
答案 after→before [根据语境可知，此处表示“之前”，故用before。]
易错题一：地点状语从句中引导词的误用
[例1] What a neat philosophy it is never to give up looking for a way to get ________ you're supposed to go!
[错解] what
[错因分析] 考生误以为这是一个宾语从句，从而错用what。
[答案] where
[心得体会]
[例2] I can go ________ I want just by driving my own car. I feel the whole world is under my control.
[错解] where
[错因分析] 考生误以为这是一个简单的地点状语从句，误填where。
[答案] wherever
[心得体会]
易错题二：原因、让步状语从句中引导词的误用
[例1] You cannot walk away just ________ someone tells you he doesn't want to buy. As an assistant you should try your best to persuade our customers to buy something.
[错解] after
[错因分析] 不少考生根据对句子的理解易误用after。考生认为这里表示的是“你不能在顾客告诉你他不买之后就走开”。
[答案] because
[心得体会]
[例2] Impressive ________ the record is, it fades next to the story of Armstrong's struggle against disease.
[错解] although
[错因分析] 考生易误用although，因为考生可能仅注意到了前后两句话之间的让步关系。
[答案] as/though
[心得体会]
易错题三：When用作并列连词时的误用
[例] It's really tiresome! I had just gone to bed after a very hard day ________ the phone rang.
[错解] before
[错因分析] 本题易错填before，原因是考生只注意到了空格前后两个分句之间的先后关系，却忽视了前句提供的语境。
[答案] when
[心得体会]