—Please ______ us in the discussion.—I'd like to，but I'm ______busy at the moment.

We didn’t intend to get much from the business the first year, while it ______ so well.     

Tom, ______ yourself .Did you forget the school rules?

If you say that some people are selfless, you agree because they ______ other people more than themselves.

I ________my homework to make sure that nothing had been missed.