Good question, i have added in my book.

來源: 走馬讀人 於 2016-06-01 16:22:41 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (69 bytes)
回答: 請問英語有幾種語調？ 由 gooog 於 2016-06-01 12:05:03

up, down hint meaning...   question /fact secret

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