--My father ___________ a letter yesterday, but I’m not sure if he has finished it. ---Why not ask him about it ?
Unluckily, a car accident _____ on this road last week.
It is a pity that his son was born _______ a weak heart.
It is wrong of a student ______ his homework by himself. Copying makes one lazy.
—The theatre is far away and there is no bus. —Do you mean it is ______ to take a taxi?
—I hear Tom is leaving.— ____________ why?