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sentence that uses a colon correctly. My brother has several pets: a dog, two cats, a dozen fish, and a hamster named Beauregard. Cynthia is constantly posting videos of her cat online: she has way too much free time these days. There are some downsides to owning a pet including: changing litter boxes, time spent in obedience training, and the cost of food and care items. Whenever someone enters the room: Shirley’s bird squawks, “Hey good looking!”