Did you see a dentist before?Have you suffered the toothache late in the night?Taking care of your teeth is necessary（必要的）.And it\’s important to have healthy teeth.They can help you speak clearly.Do you want to have healthy teeth?
Follow my suggestions.
It\’s not enough to brush your teeth only once a day.Brush your teeth at once after each meal.Food debris（残渣）can make your teeth ill slowly（缓慢地）.And you should brush all of your teeth,not just the front ones.Spend some time on the teeth along the sides.Take your time while you are brushing.
Spend at least three minutes each time when you brush.Eat fewer candies or other sweet food.Lots of fruit and vegetables can make your teeth strong.Drink more water but not drinks such as coffee and coke.
Go to see a dentist and ask him to check your teeth once a year.He can find out your problem before it becomes too serious.
If you follow these suggestions,you\’ll have white and healthy teeth.
（1）From this text,when do we need to brush teeth? ______
A.Before each meal.
B.After each meal.
C.Before sleeping.
D.After getting up.
（2）How long should we brush teeth each time? ______
A.At least one minute.
B.At least two minutes.
C.At least three minutes.
D.At least four minutes.
（3）What can make teeth strong? ______
A.Fruit and sweet food.
B.Coffee and vegetables.
C.Sweet food and vegetables.
D.Fruit and vegetables.
（4）How often should we go to see a dentist? ______
A.Once a year.
B.Twice a year.
B.Twice a month.
D.Once a month.
（5）What is the structure of the text? ______
A.①②/③④/⑤
B.①/②③④/⑤
C.①/②③④⑤
D.①②③/④⑤