They are discussing how to ____a plan to advertise their new product in the office.
The problem is not _____ easy. Think _____ over.
It is so difficult a problem that _____ student in this class _____ work it out.
I think he is _____ to win, but I'm not sure.
They own two cars, not to _____ a motorbike.
The judge paid no attention to _____ he had just lost his wife.