UC知道一篇完型 看看啊
来源：百度知道 编辑：UC知道 时间：2024/09/21 21:50:02
It is very important to have healthy teeth. Good teeth help us to chew our food. They also help us to look nice.
How does a tooth go bad? The dacay begins in a little crack in the enamel (珐琅) covering of the tooth. This happens after germs and bits of food have__1___there. Then the decay slowly spreads inside the tooth. In the end, poison goes into the blood, and we may feel qmite ill.
How can we keep our teeth healthy? First, we ought to visit our dentist twice a year. He can fill the small holes in our teeth before they destroy the teeth. He can examine our teeth to check that they are growing in the right way,___2___, many people wait until they have toothache before they see a dentist. Secondly, we should brush our teeth with a toothbrush and fluoride (氟化物) toothpaste at least twice a day-once after breakfast and once before we go to bed. We can also use wooden toothpicks to___3____between our teeth after a meal. Thirdly, we should eat food that is beneficial to our tee
How does a tooth go bad? The dacay begins in a little crack in the enamel (珐琅) covering of the tooth. This happens after germs and bits of food have__1___there. Then the decay slowly spreads inside the tooth. In the end, poison goes into the blood, and we may feel qmite ill.
How can we keep our teeth healthy? First, we ought to visit our dentist twice a year. He can fill the small holes in our teeth before they destroy the teeth. He can examine our teeth to check that they are growing in the right way,___2___, many people wait until they have toothache before they see a dentist. Secondly, we should brush our teeth with a toothbrush and fluoride (氟化物) toothpaste at least twice a day-once after breakfast and once before we go to bed. We can also use wooden toothpicks to___3____between our teeth after a meal. Thirdly, we should eat food that is beneficial to our tee
1.collect有堆积的意思；lay放，下蛋的意思。故选B
2.前句说牙医检查牙齿，后句说有的人要等到牙疼才就医，中间明显有个转折的语气，因选c
4.attach有贴上，拴上的意思。比如把标签贴在行李箱上；把马栓在柱子上。stick to有一种黏在上面的感觉.