P-22:put a gag on (prevent somebody from speaking) 堵住口
A:I have promised her to keep it a secret. I won't tell you.
A:我已经答应她要保守秘密的，我不会告诉你的。
B:Why? I promise you I won't tell anyone else.
B：怎么啦？我保证不会告诉任何人的。
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.
A：不，我不相信你，我非常了解你，除非我能塞住你的嘴，否则不能让你保守秘密。
