Part 1. Complete the dialogue. worried / happy / cavity / teeth / is (2) / are Minh is sitting in Dr Lai's surgery. Dr Lai is checking his (1)_______. Dr Lai is kind. She smiles at Minh and says, “Don't worry, Minh. You have one small (2)______, but it isn't serious. Your other teeth are fine.” Minh is very (3)______. Dr Lai fills the cavity in Minh's tooth. She finishes in less than 10 minutes. Minh (4) _____ very pleased. Then Dr Lai sits down and talks to Minh again. "How often do you brush your teeth, Minh?” she asks. Minh looks (5)______ again. "Oh, I ... Well, sometimes I forget to brush my teeth.” "Try not to forget,” Dr Lai says. 'Brushing your teeth (6)________ very important. Clean teeth are