do开头的一般疑问句

1.Do you speak English?2.Do you have the flight number?3.Do you want to make a call?

Do例句

Do it yourself ─ I don't have time.

你自己做吧——我没时间。

I could do it now, if you like.

如果你愿意的话，我现在就可以做这事。

What in the world did they think they were doing?

他们到底认为自己在做什么？

He would do well to concentrate more on his work.

他最好还是更加集中精力在工作上。

One major problem did present itself, though.

不过，确实出现了一个重大问题。