That's definite then, is it?

那么，那是确切的了，是吗？

《牛津词典》

Is it within walking distance ?

那里步行走得到吗？

《牛津词典》

Is it true she's leaving?

她要走是真的吗？

《牛津词典》

Millions of radio listeners heard a voice from the Cape Canaveral control room say: "This is it,Alan Shepard,there's no turning back.

VOA: special.2011.05.15

And I won't go through it, but what you can see is it's more or less, it is in fact, exponential.

我不想全讲一遍,但是你们可以看到。

麻省理工公开课 - 计算机科学及编程导论课程节选

The "is it okay" question pattern is something that you can use to make your speech a little less formal.

is it okay”问句能够让你说的话不过于正式。

Is it okay 课堂 - SpeakingMax英语口语达人

Is it any wonder the markets have become so much more volatile in recent years?

FORBES: Recession 101

Is it possible to get hold of a copy of the last company accounts?

BBC: Pensions posers

But is it as important to the company's future as the hype around the event suggested?

BBC: Facebook��s Graph targets Google