Now I know what to do.

现在我知道该怎么做了！

youdao

And he said, 'Not a problem. I know what to do.

他说，不成问题，我知道做什么。

youdao

Mike: Look. I wrote the story, so I know what to do.

迈克：看，剧本是我写的，我知道该干嘛。

youdao

I do not know what else to do but make the best of a bad deal and shake hands over it."

VOA: special.2009.06.27

You divide and you find it's 9 and you say, "Okay, I know what to do with Newton's laws."

除一下,会得到 9,然后你说,"好了,我会用牛顿定律了"

耶鲁公开课 - 基础物理课程节选

I chose English Literature because when I started off a university, I didn't know what it was I wanted to do.

我选英语文学是因为当我刚上大学的时候，我不知道自己到底想做什么。

为何选那门专业？ - SpeakingMax英语口语达人

But it really wasn't an answer because I was too young to know what I wanted to do.

WHITEHOUSE: Take Our Daughters and Sons to Work Day 2012

"I already know what to do, " he says.

CNN: A Philippine Tale of Two Brothers

I'm sorry to of lied to you all but I didn't know what to do.

BBC: Tia Sharp murder trial: full Stuart Hazell letter