50. The Englishman has a very good ear _____ music. You can ask him for some advice.
—I’d like some more cheese. —Sorry, there’s _____ left.
I looked under _____ bed and found _____ book I lost last week.
Geography is the study of the countries of the world and of such things ______ the land, seas, climate, towns, and population.
Late again! What’s your ______ this time?
The professor was so ______, hardly anyone came to class.