He's doing very well at school.
他在學校里學習很不錯。
We are doing our best with the limited resources available.
我們利用可獲得的有限資源，盡最大的努力。
Keep going like that ─ you're doing fine.
就這樣做下去——你做得蠻不錯嘛。
What is he doing calling at this time of night?
他干嗎這么晚了還打電話？
What do you think you're doing?
你以為你在干什么？
Don't go doing anything extreme like leaving the country.
千萬不要做出諸如離開國家之類的極端行為。