Coal was formed out of dead forests through a long _____ of chemical changes.
I can’t answer for ________ that the boy is honest.
Don’t be angry _______ me for not having written. I was really too busy.
Will you see to _______ that the luggage is brought back as soon as possible?
The Parkers bought a new house but ______ will need a lot of work before they can move in.
Will you see to _______ that my children are taken good care of while I am away?