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1 . ______ (下定决心) win the game, he put a lot of time and effort into practice.
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2 . ______ (专心于) in the book, he didn’t notice the night approaching.
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3 . Seeing no notice was taken of him, Tom felt quite awkward and stopped showing off, ______ (埋头)in reading. (根据汉语提示单词拼写)
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