Open your book at Page twenty-one.(把書翻到第二十一頁。)

Judge: Competitor number twenty-one, thank you very much indeed for that.(評委：第二十一號選手，真的非常感謝你。)

I was twenty-two – no, twenty-one.(我那時22歲。—噢不，21歲。)

When you are a twenty-one year old stallion, what might be the best reason to put it on?(所以我們想，那就讓你來體驗一下如果真的有了新生兒是什么感覺吧！)

Q: Twenty-one Indian diamond merchants were detained by Shenzhen police about two weeks ago.(問：兩周前，有21名印度鉆石商人被深圳警方拘押。)

Are you twenty-one years old?(你是21歲嗎？)

In September twenty-one new cells were built by the prisoners.(九月間，21間由囚犯建造的新禁閉室落成。)

The government implemented a rule that the guinea is worth twenty-one shillings.(政府實施了一項規定，即一幾尼價值21先令。)

Twenty-one days later, I left London.(二十一天后，我離開了倫敦。)

SHIRLEY GRIFFITH: Elizabeth Blackwell was born in Bristol, England in eighteen twenty-one.(伊麗莎白·布萊克威爾于1821年出生在英格蘭的布里斯托爾。)