I just don't understand_____________ that prevents so many Americans from being as happy as one might expect.
__________ to sunlight for too much time will do harm to one's skin.
They desired that they_______ the right to vote.
— I wonder what I should learn in the future?— You may learn art since you ________ painting and drawing.
The way he did it was different _______ we were used to.
.I told Sally how to get here, but perhaps I ________ for her.