题目内容
Some parents try to get rid of half of the candy after their children go to bed, but dentists say parents also need
to separate the good kinds of treats from the bad.
It is not exactly what a child eats that truly matters, but how much time it stays in his mouth. According to
pediatric dentists Dr Kaneta Lott, the most damaging stuff is something that is sticky or very hard and thus stays
in the mouth for a long time. This is because we all have bacteria in our mouths. When we eat, the bacteria take
our food as their food and produce an acid that destroys the surface of the teeth, causing cavities to form. The
longer the food stays in the mouth, the more likely cavities will develop. Therefore, potato chips are worse than
candy because they get stuck between teeth. For the same reason, raisins and crackers are not the best choice.
Hard candies take a long time to consume and are also a bad choice for Halloween treats.
If children really love candy, dentists recommend that they eat chocolate instead. Unlike hard candies,
chocolate dissolves quickly in the mouth. Besides, chocolate contains tannins, which help to kill some of the
bacteria in the mouth. But no matter what a child eats, brushing after each meal is still the best way to fight
cavities.
B. To point out the problems with Halloween celebrations.
C. To tell parents what sweets are less damaging to their children's teeth.
D. To teach parents the meaning of Halloween candies for their children.
B. They help bacteria to produce tannins.
C. They contain too much sugar.
D. They stay in the mouth for a long time.
B. Crackers
C. Raisins
D. Potato chips
B. They help to get rid of some bacteria in the mouth.
C. They help chocolate to dissolve more quickly.
D. They destroy the surface of the teeth.
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阅读理解。 | ||||
Below are some classified ads from an English newspaper.
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1. Where will you post a notice if you need someone to look after your children? | ||||
A. PERSONAL B. HELP WANTED C. DOMESTIC SERVICE D. ROOMMATES | ||||
2. A second-hand jacket will probably cost you _____. | ||||
A. $60 B. $40 C. $20 D. 10 | ||||
3. To have your travel notes published, you may contact _____. | ||||
A. Students' Union B. Gayle Moore C. The International Center D. Life Planning Workshop | ||||
4. If you want to have someone wake you up in the morning, you may call _____. | ||||
A. 800-5224 B. 800-5770 C. 800-7839 D. 800-0760 |