Which sentence is an example of proper colon use? marceline’s hobbies include: singing, dancing, and cheering. mark twain tried many jobs before becoming a successful writer: a riverboat pilot, a soldier, a silver miner, and a printer’s apprentice. some required equipment for camping is: a bedroll, cooking supplies, sturdy shoes, and a rope. i am going to the grocery store for: tomatoes, limes, oregano, and red onions.