四、根据短文内容，在空格处填上一个恰当的词，使短文完整、通顺。$When you laugh, you will \_\_1\_\_ your mouth and show your teeth. The healthier those teeth are, the happier you look. Why is that?It's because your teeth are important in many ways. If you take care of them, they will help to take care of you. Strong, healthy \_\_2\_\_ help you eat the right food to help you grow. They also help you speak clearly. You can take care of your teeth \_\_3\_\_ doing like these:Brush your teeth \_\_4\_\_ a day—after breakfast and before bedtime. If you can, brush before lunch or after eating sweet cakes.Brush all of your teeth, not just the front ones. You should \_\_5\_\_ some time on the teeth along the sides and in the back.Take your time while brushing. Spend at least 3 minutes each time you brush.Be sure your toothbrush is soft. Ask your parents to help you get a new toothbrush \_\_6\_\_ three months.Brushing keeps your teeth healthy. You also need to care about \_\_7\_\_ you eat and drink. Eat lots of fruits and vegetables and drink water \_\_8\_\_ of drinks.1. ________2. ________3. ________4. ________5. ________6. ________7. ________8. ________$

1. open 2. teeth 3. by 4. twice 5. spend 6. every 7. what 8. instead