Kate has to go to the dentist tomorrow. Now I'm an army officer . My mother is a Finn and a Lutheran . The Chinese have expressed their opinion. An overview of the uses of the articles.
Dolphins are wise.
A dolphin is wise. The dolphin is wise. These statements are about all dolphins, a dolphin in general, not specific dolphin or group of dolphins. We may use some nouns both with and without the . We use the nouns without the when we are talking about the normal purpose of an institution rather than about a specific building.