1 . ________ the internet, a blog seized my eyes that human footprints might ________ the ecosystem.
A.When I surfed; sharpen | B.When I was surfing; threaten |
C.While surfing; sharpen | D.I surfed; threaten |
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2 . ________ (sharp) up your public speaking skills, so that you can share your book with relevant audiences. (用所给词的适当形式填空)
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3 . A little stress caused by the exams is useful as it can ________ (sharp) your mind and motivate you to do well. (所给词的适当形式填空)
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4 . She worked as a salesperson for three years, s______________ (使提高)her business skills. (根据中英文提示单词拼写)
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5 . He did a training course to ______ (sharp) his skills. (所给词的适当形式填空)
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6 . The problem with pencils is that you have to __________ (sharp) them after being used for some time. (所给词的适当形式填空)
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7 . He ________ (sharpen) his knife in order that he cut meat easily . (所给词的适当形式填空)
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8 . As is often said, reading can help to ________ (sharp) our minds. (所给词的适当形式填空)
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