阅读下面短文，用方框中所给单词的适当形式填空，使短文意思通顺、正确、连贯。

Everyone wants to have healthy teeth. When you laugh, you will open your mouth and _______ your teeth. The healthier your teeth are, the happier you feel. Why is that?
It’s because your teeth are important in many ways. You can take .________ of your teeth by doing like these:
Brush your teeth _________ a day, after getting up and before going to bed. And brush all of your teeth, not just the ________ ones. Spend at least three _________ each time you brush. Be sure your toothbrush is _________. You should use your toothbrush for three months and then ________ it.
Clean your teeth with dental floss(牙线). It feels ______ when you do it for the first time, but soon you’ll get used to do that. Brushing _____ your teeth healthy. You also need to care about what you eat and drink. Eat a lot of fruits and vegetables and drink water _______of other drinks.
Do you want have white and healthy teeth? Please brush your teeth!