The old professor told us that every part of the materials should be made use of _________the station.
The Parkers bought a new house but ______ will need a lot of work before they can move in.
It used to be thought _____ the Earth was flat.
He made _____ known to his friends that he didn’t want to enter politics.
Why shouldn’t I buy a new coat — I haven’t bought _____ for five years.
Will you see to _______ that my children are taken good care of while I am away?