| 1. 难度：中等 | |
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(2013·高考新课标全国卷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
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| 2. 难度：中等 | |
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(2013·高考新课标全国卷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
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| 3. 难度：简单 | |
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(2013·高考北京卷)Don’t turn off the computer before closing all programs，________you could have problems. A．or B．and C．but D．so
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| 4. 难度：简单 | |
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(2013·高考重庆卷)It’s not easy to change habits，________with awareness and selfcontrol，it is possible. A．for B．or C．but D．so
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| 5. 难度：简单 | |
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(2013·高考北京卷)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
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| 6. 难度：中等 | |
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(2013·高考天津卷)________ small，the company has about 1,000 buyers in over 30 countries. A．As B．If C．Although D．Once
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| 7. 难度：中等 | |
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(2013·高考重庆卷)________we have enough evidence，we can’t win the case. A．Once B．As long as C．Unless D．Since
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| 8. 难度：简单 | |
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(2013·高考山东卷)Mark needs to learn Chinese ________ his company is opening a branch in Beijing. A．unless B．until C．although D．since
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| 9. 难度：中等 | |
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(2013·高考山东卷)________I have to give a speech，I get extremely nervous before I start. A．Whatever B．Whenever C．Whoever D．However
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| 10. 难度：中等 | |
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(2013·高考辽宁卷)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
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| 11. 难度：困难 | |
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(2013·高考江苏卷)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
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| 12. 难度：中等 | |
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(2013·高考湖南卷)You must learn to consult your feelings and your reason________you reach any decision. A．although B．before C．because D．unless
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| 13. 难度：中等 | |
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(2013·高考安徽卷)It’s much easier to make friends ________ you have similar interests. A．unless B．when C．even though D．so that
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| 14. 难度：简单 | |
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(2013·高考四川卷)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
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| 15. 难度：中等 | |
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(2013·高考江西卷)She says that she’ll have to close the shop________business improves. A．if B．unless C．after D．when
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| 16. 难度：中等 | |
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(2013·高考陕西卷)I have heard a lot of good things about you________I came back from abroad. A．since B．until C．before D．when
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