I was on time for my dentist's appointment, but the dentist was still busy with another patient, so I (1) (sit) in the waiting room and (2) (read) some of the old magazines lying there. While I (3) (wonder) whether to leave and come back another day, I (4) (notice) a magazine article about teeth. It (5) (begin): 'How long is it since you last (6) (go) to the dentist? (7) (you go) regularly every six months? Or (8) (you put off) your visit for the last six years?' Next to the article was a cartoon of a man in a dentist's chair. The dentist (9) (say): 'I'm afraid this (10) (hurt).' I (11) (suddenly realize) that my tooth (12) (stop) aching. But just as I (13) (open) the door to leave, the dentist's door (14) (open). 'Next please,' he (15) (call), as the previous patient (16) (push) past me. 'Actually I'm not here to see you, I (17) (wait) for my friend,' I (18) (shout), leaving as rapidly as I could. (19) (you ever do) this kind of thing? Surely I can't be the only person who (20) (hate) the dentist!