take…at one's word
believe what sb．says is true 相信某人的话
I don't take him at his word because I think he's leading us on．我不信他的话，因为我认为他在骗我们。
You shouldn't take him at his word．你不该信他的话。
If you say that I can leave all my work to you while I'm out，I'll take you at your word．如果你说我走后把我的所有工作都能交给你，我将相信你的话。