单项选择题
A．test the captain's knowledge of medicine B．be free from work C．have the best food on the ship D．play a joke on his friends
A．A Sudden Cure. B．Two Patients. C．Captain and Sailors. D．A Difficult Voyag
A．didn't care much B．sent for a doctor C．looked after him and told him to have a rest D．gave him some medicine