why - 为什么, where - 哪里, what - 什么, when - 什么时候, who - 谁, which - 哪一个, how - 怎么样, how long - 多长, how often - 多久, how many - 多少(可数), how much - 多少(不可数) & 多少钱, how old - 多大,

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