People didn’t use toothpaste to clean their teeth until a hundred years ago. Before that, people cleaned their teeth with tea, salt,or lemon juice.  Many peope brush their teeth after they get up in the morning. To keep your teeth healthy, you need to brush them at least twice a day. You have to do that after you have breakfast and before you go to bed. It is also a good habit for you to brush your teeth right after you eat lunch or snacks. It’s good to visit the dentist twice a year, too. The dentist can help you keep your teeth healthy. Finally, eating healthy food is also good for your teeth. Take good care of your teeth, and you can have a happy and healthy life.

【題組】44. 　What’s this reading about?
(A) The ways to sell toothpaste.
(B) The ways to keep teeth healthy.
(C) The right way to brush teeth.
(D) The right time to brush teeth.