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最佳答案:this is a bunch of keysthat is a bunch of keys
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最佳答案:a set of keys
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最佳答案:That's a set of keys
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最佳答案:there are keys
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最佳答案:Tim lost a set of keys
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最佳答案:a set of keys
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最佳答案:here is a bunch of keys
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最佳答案:Tom lost a pair of keys.
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最佳答案:He found a set of keys.
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最佳答案:Tom lost some keys