单项选择题
W: Open your mouth wide. Now show me where it hurts. M: Here at the bottom, especially when I bite into something hot or cold.
A. A dentist. B. A teacher. C. A tailor. D. A painter.
A. 7:00. B. 7:15. C. 6:45. D. 6:00.
A. At the doctor’s office. B. At a store. C. At a library. D. At a bank.