| 1. 难度：中等 | |
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(2019温州)Adam has been working in the hospital ________ he left school.
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| 2. 难度：简单 | |
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(2019江西改编)The film seems interesting ________ we all want to see it.
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| 3. 难度：简单 | |
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(2019岳阳改编)The toys are really old, ________ I still want to keep them.
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| 4. 难度：简单 | |
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(2019乐山改编)Bike sharing is very useful in our daily life a________ it still has some disadvantages.
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| 5. 难度：简单 | |
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(2020原创)The soup tastes terrible b________ I put too much salt into it.
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| 6. 难度：中等 | |
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(2020原创)W________ my mom and I were talking about my father's birthday surprise, he came in.
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| 7. 难度：简单 | |
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(2020原创)You may do the survey yourself ________ work with someone else together.
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| 8. 难度：中等 | |
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(2020原创)My parents were not at home, ________ I had to look after my 5yearold sister.
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| 9. 难度：简单 | |
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(2020原创)I respect my parents, ________ sometimes I just can't agree with their old opinions.
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| 10. 难度：简单 | |
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(2019安徽)Our business won't improve ________ we offer better services to our customers. A.because B.unless C.after D.since
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| 11. 难度：简单 | |
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(2019滨州)Emily, you're playing video games again！Study hard，________ you will fail in the coming exam. A.then B.so C.and D.or
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| 12. 难度：困难 | |
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(2019苏州)Love your parents ________ they are alive. Don't wait until it is too late. A.while B.though C.because D.unless
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| 13. 难度：简单 | |
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(2019连云港)________ we didn't win the basketball game, we were satisfied with our hard work. A.If B.Though C.Since D.Because
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| 14. 难度：简单 | |
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(2019天水)I tried calling you, ________ your phone was out of service. A.and B.but C.so D.or
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| 15. 难度：简单 | |
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(2019盐城改编)I've wanted to read Peter Pan for long, ________ today I finally borrowed the book from the library. A.or B.but C.and D.so
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| 16. 难度：中等 | |
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(2019天津改编)She was tired, ________ she continued her work. A.so B.and C.but D.or
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| 17. 难度：中等 | |
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(2019邵阳改编)Let's go climbing Langshan Mountain this Saturday ________ the weather is fine. A.though B.if C.unless D.because
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| 18. 难度：简单 | |
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(2019石家庄40中二模)Mr.Smith didn't give us a lecture ________ he was ill in bed. A.until B.though C.because D.unless
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| 19. 难度：中等 | |
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(2019石家庄44中二模)He ate a lot and did little exercise ________ he gained 10 pounds in a month. A.but B.or C.and D.so
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| 20. 难度：简单 | |
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(2019石家庄41中一模)I didn't pass the exam ________ I worked hard. A.since B.unless C.though D.whether
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| 21. 难度：简单 | |
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(2019承德县一模)It's polite to avoid making noise ________ you're eating. A.unless B.until C.after D.when
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| 22. 难度：简单 | |
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(2019河北省保定市莲池区二模)She didn't go to swim ________ she finished her homework. A.while B.when C.until D.before
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| 23. 难度：中等 | |
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(2020原创)I need your help to pick out a shirt for me, the black one ________ the white one? A.or B.so C.and D.but
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| 24. 难度：中等 | |
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(2020原创)I don't have any experience in this task ________ I come here. I am a green hand. A.if B.unless C.before D.while
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| 25. 难度：简单 | |
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易错题The words “racecar”， “kayak” and “level” are the same ________ they are read left to right or right to left. A.since B.though C.unless D.whether
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| 26. 难度：简单 | |
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易错题I'm sorry, ________ I won't be able to come tonight. A.for B.and C.but D.then
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| 27. 难度：简单 | |
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创新题Plants take in carbon dioxide ________ then turn it into oxygen in the air. A.but B.although C.unless D.and
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