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最佳答案：I don't know
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最佳答案：Sorry,I don't know.
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最佳答案：I learn a lot that I do not know!
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最佳答案：I don't know what I would say.我也不知道我该说什么.
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最佳答案：I don't know how to write the word death
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最佳答案：我不知道她的年龄I don't know her ageI don't know how old she is.
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最佳答案：I don't know who you are.
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最佳答案：i do not what to do
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最佳答案：I actually don't know where you are.
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最佳答案：I don't know whether you need me or not.