三、完形填空。
If you go to a fast food restaurant, you can see a lot of teenagers. Today, many teenagers are 1 because of their favourite food. Most teenagers like junk food 2 a lot of fat, salt and sugar.
Bad eating habits are more than eating junk food. We find many teenagers don't have 3 before they go to school. During the day, some don't eat proper(恰当的) meal for lunch.
Parents today also worry about their children's diet. Some doctors give the following 4.
Teenagers shouldn't eat food with much 5. Salt can 6 illnesses(疾病) in the future.
Teenagers shouldn't have food with much sugar, for example, cola or ice cream. But they can 7 milk and yogurt.
Teenagers 8 eat some fruit and vegetables every day. Fruit and vegetables are rich in vitamins(维生素) and they have 9 fat.
Teenagers should do more 10 when they are free to keep healthy.
()1. A. poor B. thirsty C. hungry D. fat
()2. A. of B. with C. from D. in
()3. A. dinner B. lunch C. breakfast D. supper
()4. A. speeches B. advice C. choices D. goals
()5. A. fat B. salt C. sugar D. water
()6. A. cut B. care C. carry D. cause
()7. A. eat B. drink C. watch D. see
()8. A. can't B. may C. must D. maybe
()9. A. much B. little C. a little D. few
()10. A. homework B. shopping C. sports D. work

1.D 2.B 3.C 4.B 5.B 6.D 7.B 8.C 9.B 10.C

这是一篇围绕青少年健康饮食与生活习惯展开的完形填空，结合上下文语境、词义辨析和固定搭配逐题分析如下：
1. 根据后文提到垃圾食品含有大量脂肪、糖，可推断很多青少年因为爱吃这类食物变胖，poor贫穷的，thirsty口渴的，hungry饥饿的，均不符合语境，选D。
2. 此处表达“含有大量脂肪、盐和糖的垃圾食品”，介词with可以表示“带有、含有”的含义，选B。
3. 根据后文“上学前”的时间提示，对应的餐食是早餐，句意为“我们发现很多青少年上学前不吃早餐”，选C。
4. 前文提到家长担心孩子的饮食，可推断医生给出了相关建议，advice意为“建议”，speeches演讲，choices选择，goals目标，均不符合语境，选B。
5. 根据后一句的主语Salt提示，此处指青少年不应该吃含盐量高的食物，选B。
6. 句意为“盐会在未来引发疾病”，cause意为“导致、引发”，cut切割，care关心，carry携带，均不符合句意，选D。
7. 后文的牛奶和酸奶属于饮品，搭配的动作是喝，选B。
8. 此处是医生给出的健康强制建议，句意为“青少年每天必须吃一些水果和蔬菜”，must意为“必须”，符合语境，选C。
9. 句意为“水果蔬菜富含维生素，几乎不含脂肪”，fat是不可数名词，little表示“几乎没有”，修饰不可数名词，符合健康常识，much很多，a little一点，few修饰可数名词复数，均不符合，选B。
10. 句意为“青少年空闲时应该多做运动来保持健康”，do sports是固定搭配，意为“做运动”，homework作业，shopping购物，work工作，均不符合保持健康的语境，选C。