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最佳答案:借、担心、敲 borrowed,worried,knocked
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最佳答案:uy-----------------buying ,boughtread----------------reading .,readlisten ------
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最佳答案:works, working, workedborrows,borrowing, borrowed三单begins, 现在分词beginning, 过去式beg
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最佳答案:orrowed,climbed,enjoyed,helped,changed,decided,hoped,used,studied,tried