题目内容：

    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. _________ is that?

It’s because your teeth are important in many ways. Take care of them, _________ they’ll help to take care of you. Strong, healthy teeth help you grow. They also help you _________ clearly. You can take care of your teeth by doing like these:

Brush your teeth twice a day, after getting up and before bedtime. And you brush all of your teeth, not just the front ones. _________ some time on the teeth along the sides and in the back. Take your time while brushing. Spend at least three _________ each time you brush. Be sure your toothbrush is soft. Ask your parents to help you get a new toothbrush and change it _________ three months. Clean between your teeth with dental floss (线). It feels strange when you do it at first, but soon you’ll get used to _________ it. Brushing _________ your teeth healthy. You ________________ need to care about what you eat and drink. Eat more fruits and vegetables and drink water instead of drinks.

Do you want to have white and healthy teeth? Please brush your teeth!

1.A.clean B.show C.wash D.brush

2.A.What B.Who C.How D.Why

3.A.but B.and C.or D.so

4.A.laugh B.shout C.cry D.speak

5.A.Take B.Spend C.Cost D.Pay

6.A.years B.hours C.minutes D.days

7.A.every B.both C.either D.all

8.A.doing B.making C.helping D.feeling

9.A.starts B.lets C.makes D.needs

10.A.slways B.also C.still D.seldom