The president who has won the election ______ on television next week.
He ______ for her for one hour by the time she arrived there.
Under no circumstances ______ leave his post.
I remember ______ to the zoo by my father when I was a child.
Businessmen make most of their income from profit ______ by producing and selling products.
He is one of the leaders ______ to attend the important international conference.
With the population explosion, scientists will have to ______ new methods of increasing the worlds food supply.