【解析】连词的用法。A. if如果，引导条件状语从句； B. because因为，引导原因状语从句；C. unless除非，如果不??，引导条件状语从句；D. when当??时候，引导1时间状语从句。句意为如果没有一张地图或者到有，游客很可能在北京迷路。故选择C。 【2010广东·广州】18. The teacher speaks very loudly ____ all the students can hear her.
A. so that 答案：A
【解析】连词的用法。句意为老师说话的声音很大以便于所有的学生都能听到。so that 意为“以至于，以便于”，故选A。
【2010宁夏】28. Bob is young, _______ he knows a lot.
A. because 答案C
【解析】根据句意，句子是转折关系，故答案应选but.
【2010四川·内江】---What do you think of this skirt ?
---It’s beautiful and it fits me well ,_________ I like it very much .
A. since B. so C. but 答案B
【解析】since 既然；so 所以；but 但是，根据句意，是因果关系，所以答案选Ｂ。
【2011邵阳】27. We didn't go home ______ the old man was sent to the hospital. A. until B. when C. while 答案：A
【解析】考查连词的用法。not?until“直到?才”。句意为：直到把老人送去医院，我们才回家。故选A。
【2011浙江丽水】19．一I can stay and help you_________ you like． 一So nice of you．Bill．
A．until B．．though C．if D．and 答案：C
【解析】连词的用法。until意思是直到??时候，though是尽管，if意思是如果，and意为和，可以不用翻译，根据句意，如果你喜欢，我可以呆在这儿帮助你。
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B. because C. since D. when
B. so C. but D. unless
【2011山东临沂】26. Don’t forget to wash your hands _________ you have meals. A. before B. until C. though D. unless 答案：A
【解析】连词的用法。根据句意和常识，应为“饭前洗手”，用连词before表达“在?之前”。 【2011?山东青岛】26. — I suggest buying her a Teddy Bear for her birthday. —_____someone else brings the same present? A. If 答案：C
【解析】考查连词的用法。根据句意I suggest buying her a Teddy Bear for her birthday.“我建议她生日送只泰迪熊。”可知答案选C，意为 “如果??将会怎么样？”表条件的假设关系。
【2011?山东青岛】24. You will achieve nothing _ you work hard. A. if 答案：B
【解析】考查连词的用法。根据You will achieve nothing“你什么都做不成。”和you work hard.“你努力工作。”可知二者是表条件的假设关系，故答案选B，意为“除非”，与if?not同义。
【2011?山东青岛】21. Tom rushed into the house______ his mother was cooking. A. as
B. before
C. while
D. after
B. unless
C. when
D. that
B. What
C. What if
D. How about
答案：C 考查连词的用法。从句意可以看出rushed into the house与was cooking是同时发生的，故答案选C，意为“当??时候”，引导过去将来时。
【2011安徽】48. You'd better take the map with you you won't get lost, A. as long as B. as soon as C. now that D. so that 答案：D
【解析】选D。考查连词词组。As long as 和??一样长；as soon as 一??就；so that 以致于；以便于。结合句意：你最好随身带着地图，以便与别迷路。
【2011?广州】2. _____ they are very tired, they feel happy because they’ve finally finished their project.
A. So B. Although C. If D. But 答案:B
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解析:考查连词。分析句意可知，他们虽然很累，但很快乐，前半句是让步状语从句，用although。
【2011湖北黄冈】34. —You bought the car about ten years ago? —Yes. ________ it's old, it still runs well.
A. Because B. Since C. Although D. But 答案：C
【解析】考查连词辨析。because意为“因为”；since意为“既然；自从”；although意为“尽管”；but意为“但是”。根据句意 “尽管它很旧，但是它仍然跑得很好。”为转折意思，故选C。
【2011四川德阳】16. _____ he was only twelve, he could run faster than any kids in the school.
A. Though B. Because C. If 答案： A
【解析】本题考查连词的用法。though意为“虽然；尽管”；because意为“因为”；if意为“如果”。句意“尽管他只有12岁，他比学校的任何孩子都跑得快”。根据句意应选A。 【2011上海】38. We didn’t start our discussion _____ everybody arrived. A) since B) if C) while D) until 答案：D
【解析】考查点：not?until?的用法。 解题思路：not?until表示“直到??才??”,句意为“直到每个人都到齐了我们才开始讨论。”since表示“自??以来；既然，由于”；if表示“如果”表假设关系，while“虽然，当??时候”，均与句意不符；
【2011?无锡】__________ Amy likes to go to the cinema, but she doesn’t like to see horror films.
A. Since B. As C. Though D. 不填 答案：D
【解析】英语中though与but不能同时出现在同一个句子中，句中已有but，故答案选D。 【2011山东潍坊】28. The magazine was started by Becky, ______ I know.
A. as far as B. as well as C. as soon as D. as much as 答案：A
【解析】用作连词的短语辨析。as far as意为“尽??；就??”；as well as意为“和；
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也；既??又”；as soon as意为“尽快”；as much as意为“像??一样”，表示程度。句意为“就我所知，这本杂志是Becky创办的。”故选A。 【2011山东聊城】32. —How do you like the story?
—Interesting, _______ the end of it is not perfect. A. so 答案：B
【解析】连词的用法。so因此；though虽然，尽管；or否则，或者；because因为。根据句意：你觉得这个故事怎样？有趣，尽管结尾不是完美的。故选B。
【2011·南京】6. They will try their best in the Dragon Boat Racing ______ they may fail.
A. if B. although C. unless D. until 答案:B
解析:考查句子的逻辑关系和连词的用法。分析句子的逻辑关系，前后两个句子的关系，后半句是让步状语从句，if引导条件状语，although引导让步状语从句，unless从属连词，until引导条件状语从句，含有否定意义；引导时间状语从句。故选B项。 【2011山东威海】30.—Would you like to go for a walk with me, Allen? —I'd love to, ________you don't want to go alone. A. until B. before C. if 答案：C
【解析】 连词辨析。until意为“直到”， before意为“在以前；在之前”， if为“如果；是否”， after 指“在之后”。 根据“如果你不想独自去的话，我想（和你一起）去”可知用if。
【2011山东菏泽】32. We can easily become unhappy_____ we work out our problems in our daily life.
A. after 答案：D
【解析】连词用法。句意：在日常生活中，如果我们解决不了问题，我们很容易变的不高兴。unless＝if not如果不??；after在??之后；if如果；until直到??为止。故选D。 【2011山东枣庄】20. I won’t pass the exam ______I work hard.. A. whenever
B. though C. or D. because
D. after
B. if C. until D. unless
B. because C. if D. unless
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答案： D
【解析】D 根据句意：我将不会通过考试，除非我努力学习。whenever无论何时，because因为，if如果，unless除非。故选D。
【2011山东滨州】28. –What was your brother doing at this time yesterday? –He was reading a magazine ________ I was writing an e-mail at home. A. as soon as while 答案：D
【解析】考查连词的用法。 as soon as“一??就??”； after“在??之后”； until“直到??”；
while“当??时候，和??同时”。由答语“他在读杂志而我在写电子邮件”可知，两个动作同时进行，故选D。
【2011山东泰安】28. —Mom, shall we have supper now? —Oh, we won’t have supper ______ your dad comes back. A. until after 答案：A
【解析】连词的用法。until用于否定句中，表示句子的动作直到until短语所表示的时间才开始发生，即表示动作的起点。While跟连续性的动词；since连接的句子主句一般用现在完成时，从句用过去时。
【2011浙江杭州】26. I really enjoyed your lecture, ______ there were some parts I didn’t quite understand. A. because 答案：C
【解析】连词的用法。由后句句意“有一些我不理解的”和前句句意“我真的很喜欢你的讲座”可判断为转折关系。故选C。
【2011浙江杭州】27. It’s too late to invite any more people. ______, you know how Tim hates parties. A. Besides 答案：A
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B. after C. until D.
B. since C. while D.
B. unless C. though D. After
B. However C. Still D. Instead