In ancient times, people rarely travelled long distances and most farmers only traveled______ the local market.
Scientists _______ a lot of experiments on animals, hoping to find and effective way to cure the patients who had AIDS.
Putting in a new window will ______ cutting away part of the roof.
Mr. Smith was so angry at all _____ Bill was doing ______ he left.
–He didn’t feel a bit nervous when _____. --No. He’d spent a lot of time _____ for it after all.
We will be for ______ promises to volunteer to help us solve the puzzling problem.