_______ difficult the task may be, we must finish it on time, because we can’t meet such a precious opportunity _______ we have expected.

I hear that you have made a new market plan. —Yes, but what puzzles me now is how to ______the plan.

________________ —Yes, I do.

ctor must be _______ 24 hours a day, 7 days aweek in the boarding school.

Not until _________________ the better qualities in ourselves ____________ expect to find them in others.