What is he up to now?

他现在在干什么？

youdao

What is he up to with all those books on the floor?

这么多书在地上，他在干什么呢？

youdao

He hasn't finished what he had to say and is going to make it up.

他话没讲完，还得找补几句。

《新英汉大辞典》

He said the Earth is hiring and it was up to them to join together and do what is needed to help save the planet.

VOA: special.2009.06.05

He spoke advancing toward her: What is it you see from up there always?--for I want to know."

他站在她面前：,“你在那里看什么呢？我想知道，“

耶鲁公开课 - 现代诗歌课程节选

So, basically what he's showing in these cubes is that there are eight spaces that need to be filled up to have a full cube.

因此，基本上他在这里展示是这些立方体中一共有,八个位置，需要把它们都填满才得到一个完整的立方体。

麻省理工公开课 - 化学原理课程节选

And by now, all indications are that he's ready to wrap things up, and we wait to see what he is going to come up with, if anything, in terms of charges and indictments.

NPR: Rove Concludes Testimony in CIA Leak Case

"I know when Ted is home, who is going in and out of his house, which lights are on, what he is up to, " says Mr. Zehetbauer.

WSJ: The Twin Houses of an Odd Couple

Is he going to take control of what's happening up there, or is he going to continue to defer to Congress?

WHITEHOUSE: Press Briefing