Dialogue：

A: I have promised her to keep it a secret. I won't tell you.

我已經答應她要保守秘密的，我不會告訴你的。

B: Why? I promise you I won't tell anyone else.

怎么啦？我保證不會告訴任何人的。

A: No, I don't trust you. I know you very well. You couldn't keep it a secret unless I put a gag on you.

不，我不相信你，我非常了解你，除非我能塞住你的嘴，否則不能讓你保守秘密。

一， 詞海拾貝

put a gag on someone

exp. To prevent somebody from speaking. （不讓某人說話，堵住某人的嘴）

e.g. I can put a gag on her just by telling him that I am married already to his elder brother.

我只要告訴他我已經嫁給他的哥哥了，就能堵住她們的嘴。

e.g. He gave you the money in order to put a gag on you.

他給你那筆錢是為了堵住你的嘴。

e.g. Mary would put a gag on her right away as she spoke but she was too quick for him.

Mary 想馬上堵住她的嘴，但沒有來得及了。

二， 語匯積累

keep it a secret：守住秘密

e.g. Don't tell anyone about our plan, keep it a secret .

不要對任何人講我們的計劃，要保密。

e.g. Don't tell Dan if you want to keep it a secret as the guy's a blabbermouth.

如果你想守住這個秘密的話，就別告訴Dan，因為那個家伙是個大嘴巴。