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___1___begins in a little crack in the enamel (珐琅) covering of the tooth. This happens after germs and bits of food have___2___ there. Then the decay slowly spreads inside the tooth. In the end, poison goes into the blood, and we may feel quite ill.

　　        How can we keep our teeth ___3___? 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___4___ our teeth to check that they are growing in the right way. ___5___, many people wait until they have toothache teeth with a toothbrush and fluoride (氟化物) toothpaste at least ___6___a day---once after breakfast and once before we go to bed. We can also use wooden toothpicks to___7___between our teeth after a meal. Thirdly, we should eat food that is ___8___to our teeth and our body: milk, cheese, fish, bread, potatoes, red rice, raw vegetables and fresh fruit. Chocolate, sweets, biscuits and cakes are bad, especially___9 ___we eat them between meals. They are harmful because they___10___our teeth and cause decay.

　　1. A. destruction    B. decay       C. fault       D. hurt

　　2. A. stored      B. collected     C. laid       D. piled

　　3. A. healthy      B. complete     C. effective      D. painless

　　4. A. observe      B. skim        C. watch       D. examine

　　5. A. Unexpectedly B. Certainly small  C. Unfortunately  D. Generally  

　　6. A. once        B. twice       C. three times   D. Your times

　　7. A. drill        B. dig         C. clean        D. explore

　　8. A. delicious    B. valuable     C. beneficial    D. meaningful

　　9. A. what        B. how        C. whether     D. when

　　10. A. stick to     B. attach to    C. fix on       D. keep to

　　1-5BBADC  6-10BCCDA

　　题号 答案 考察内容

　　解题依据 解题分析

　　1 B 词义比较前后照应 牙齿怎么变坏的呢？牙齿溃烂(decay)从牙齿表层的珐琅覆盖物中小裂缝开始。后文几次出现了该词。destruction破坏，毁灭；decay腐朽，溃烂；fault 过错，毛病；hurt伤痛，伤害。

　　2 B 词义辨析常识运用 细菌和碎食在小裂缝里聚集(collect)起来。store贮藏，贮备，一般指有意性的囤积以便将来之用；collect收集，聚集，指有意或无意性的物件的聚拢起来；lay放置，铺设；pile堆积，积累，此项干扰性比较大，但pile多指物件象山一样的垒起堆积，只是collect的某一种方式而已。

　　3 A 常识运用逻辑推理前后照应词义比较 那么，如何才能保持牙齿的健康(healthy)呢？完全的，完整的(complete)，无痛的， 不痛的(painless)牙齿，也许并不健康。effective有效的，通常用于象计划之类的事件，而不用于指具体的物件。

　　4 D 词义辨析 牙医检查(examine)我们的牙齿以核实牙齿生长正常。 observe 观察， 观测；skim撇去(浮沫)，(使)滑过；watch注视，监视；examine检查，通常指对物体内部情况的查看。

　　5 C 常识运用 遗憾(unfortunately)的是，许多人们不是每年去检查两次，而是直到真正牙疼才去看牙医。 

　　6 B 前后照应 每天就用牙刷和氟化牙膏在早餐后和就寝之前把牙齿刷至少两次(twice)。

　　7 C 常识运用词义辨析 我们也要饭后用木制的牙签清洁(clean)牙齿。clean使干净， 清扫；explore 探测，探究；drill钻孔；dig 掘，挖。

　　8 C 常识运用逻辑推理 再则，我们应该吃有利(beneficial)于牙齿和身体的食物：牛奶，乳酪，鱼，面包，土豆，红米，蔬菜和水果。delicious美味的；valuable 贵重的，有价值的；beneficial有益的，得利的；meaningful意味深长的。

　　9 D 语句连贯 尤其是在两顿饭之间的时间(when)里不要吃巧克力，糖，饼干和蛋糕。

　　10 A 常识运用逻辑推理 这些有害的物质就会粘贴在(stick to)牙齿上而导致牙齿的溃烂。stick to粘住，粘贴；attach to 缚上，系上；fix on固着，固定；keep to坚持，保持。

　　(B)

　　        You've just finished your A-levels and you've got a place at university, but you'd really like a break from the academic world. Why not think about taking a year out? While most students go___11___from school to university, more and more young people today are choosing to spend a year at "the university of life "___12___. There are lots of things to choose from. You could work in a bank or do community work. You might even do something challenging. Such as___13___an expedition (探险) to the Amazon rainforest. The experience will___14___your horizons and teach you new skills. It may also give you the chance to earn some money, which will be very helpful when you___15___start your studies. If you're interested in taking a year out, you must make sure that the university will___16 ___your place for you till next year. Most are quite happy to do this, ___17___they find that year-out students are___18___experienced, confident, and independent. But don't forget: it's a year out not a year___19___. Your university will want to know what you're going to do. They won't be very pleased if you just want to do___20___for a year. So what would you do with a year out?