| 1. 难度：中等 | |
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Over the years, people have learned from ants that teamwork and perseverance are indeed two key ______ to success. A. certificates B. ingredients C. approaches D. instructions
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| 2. 难度：简单 | |
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A 19-year-old teenager from Guangdong nicknamed Niko demanded an apology from Youku, which he believed violated their copyrights as it used his team's photos without ______. A. commitment B. approval C. recognition D. reservation
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| 3. 难度：中等 | |
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Los Angeles Times reported that researchers may have found a way to ______ human life by changing certain genes, so that humans might expect to live twice as long. A. extend B. preserve C. multiply D. transform
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| 4. 难度：中等 | |
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All work and no play makes Jack a dull boy, which suggests that work and play do not ______ but promote each other. A. condemn B. convert C. contradict D. confirm
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| 5. 难度：中等 | |
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The young man ______with honesty and won the judges in the interview, as a result, he was admitted to the foreign company. A. got away B. took up C. held on D. stood out
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| 6. 难度：中等 | |
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Having manners shows good character, consideration and respect for others, taking you where degrees and money cannot and ______ a better world. A. taking over B. adapting to C. making for D. fitting into
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