Mr. Robinson never went to see a dentist, because he was afraid , but then his teeth began aching a lot, and he had to see a dentist. The dentist did a lot of work in his mouth for a long time. On the last day Mr. Robinson asked the dentist, "How much is all the work going to cost ?" "Twenty-five dollars," said the dentist. But he didn't ask him for the money. After a month Mr. Robinson phoned the dentist and said, "You haven't asked me for any money for your work." "Oh," the dentist answered, "I never ask a gentleman for money." "Then how do you live?" Mr. Robinson asked. "Most gentlemen pay me quickly, the dentist said, "but some don't. I wait for my money for two months, and then I say, 'That man is not a gentleman,' and then I ask him for my money. Mr. Robinson   _   until his teeth began aching a lot.
wasn't afraid didn't see a dentist wanted to see a dentist went to see a dentist