六、信息还原。
阅读下面短文，从短文后所给的选项中选出能填入短文空白处的最佳选项，使短文通顺连贯，其中有两项是多余选项。
Caring for Your Teeth
1
Your teeth are different in shape and size depending on where they are in your mouth. These differences allow the teeth to do many different jobs. Teeth help you to chew food. They help you to talk, and to pronounce different sounds clearly. Finally, teeth help to give your face its shape.
2
It is easy to get your teeth clean and healthy. A simple routine can help prevent most dental problems.
Brush your teeth twice a day.
Rinse(漱）your mouth after meals.
Have good eating habits.
Have regular dental check-ups.
3
Your dentist will be able to tell you which toothbrush is suitable for you. Some people need more specialized(专用的）toothbrushes. For example, people with sensitive teeth can use softer toothbrushes. There are also smaller-headed toothbrushes for people with irregular teeth.
4
Tests have shown that electric toothbrushes are more effective(有效的). Everyone can use an electric toothbrush. They are especially useful to disabled or elderly people.
Electric toothbrushes can also be better for children as they may be more likely to brush regularly because of the fun that the electric toothbrushes bring them.
5
Worn-out toothbrushes cannot clean your teeth properly. It is important to change your toothbrush every two to three months or sooner if the filaments(细丝）become worn.
A. How often should you change your toothbrush?
B. What kind of toothbrush should you use?
C. Do electric toothbrushes clean better?
D. Why should you often visit your dentist?
E. How can you keep your teeth healthy?
F. Why are your teeth so important?
G. How do you use your toothbrush?
1.
2.
3.
4.
5.