What has a soft bed but never sleeps, a big mouth but never speaks?什么东西有柔软的床，但从不睡觉，有一张大嘴却从来不说话？
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What is heavier in summer than in winter？什么东西夏天比冬天重？
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What animal wears big black glasses on its face?什么动物脸上戴个大黑眼镜吗？
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What two words contain thousands of letters？哪两个单词包含了所有的字母？
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