I must get on, so I cannot attend the party this evening.

我得接着干，所以我不能参加晚会了。

youdao

But I also understood that I must get on with my work and not dwell on one subject or book.

但我还知道的是，我必须继续自己的工作，不要停留在一个话题或书里头。

youdao

I must get well soon because I will have tests on science and geography next week.

我必须尽快好起来，因为下周我有科学和地理考试。

youdao

If he feels it is right to go to Portsmouth, then as far as I'm concerned we must get on with it and deal with it - but I have to say he has not told me he is going.

BBC: SPORT | Football | Bassett fears Redknapp departure

President GEORGE W. BUSH: And I've strongly believed that we can and must get a comprehensive immigration plan on my desk this year.

NPR: U.S. Communities Act on Immigration Issues

Right now, Facebook Graph Search is in beta, so to try it, one must get on a waiting list to see how it actually works. (I am on the waiting list).

FORBES: Facebook's New Graph Search: Boon or Privacy Concern?