Question

    Now, we know that if we do not get enough vitamins, we are at risk of developing a number of diseases. As a______, vitamin supplements（补品）， though expensive, are popular with people who worry that they are not getting enough vitamins. But medical experts have_______little proof（证据） that most supplements do anything to improve health or protect against disease.

In_______, medical experts warn that taking too many of some vitamins can be harmful. For example, too much vitamin E can ___  bleeding. People should discuss what vitamins they take with their doctors, as some vitamins can produce ______effects when mixed with medicine.

Experts, however, say that sometimes vitamins _____help prevent diseases. People who know ______lack a particular vitamin should take vitamin supplements. Some older adults, for example, may not_______enough vitamin Btwelve. This is_______, as people get older, the body loses its ability to take it from food. Also, people who spend much time inside may need some extra vitamin D as the skin makes this vitamin________sunlight.

Different vitamins are found in different ______. Vitamin A is found in fish liver oil. It is also in the yellow part of eggs. Sweet potatoes, carrots and other darkly coloured fruit and vegetables contain substances（物质） that the body can_______into vitamin A. Vitamin B-twelve is found in green leaf________and other food, like fruit. Vitamin K can be________found in pork products.

For most people, a balanced diet can make sure enough of the vitamins our bodies________. So, it is important for us to eat a mixture of food every day to make sure that we get enough vitamins our bodies need.

1.A.result B.exam C.tradition D.service

2.A.found B.made C.caught D.served

3.A.cash B.fact C.danger D.colour

4.A.choose B.check C.cause D.carry

5.A.harmful B.helpful C.hopeful D.careful

6.A.should B.will C.can D.must

7.A.they B.she C.he D.it

8.A.start B.change C.have D.think

9.A.if B.because C.since D.when

10.A.in B.on C.at D.from

11.A.place B.food C.style D.form

12.A.change B.break C.throw D.look

13.A.noodles B.milk C.vegetables D.meat

14.A.secretly B.proudly C.naturally D.easily

15.A.need B.spread C.start D.leave

Answer

1.A

2.A

3.B

4.C

5.A

6.C

7.A

8.C

9.B

10.D

11.B

12.A

13.C

14.D

15.A

【解析】

本文是一篇说明文。主要讲述了维生素对我们的身体有一定的好处，均衡的饮食可以让我们补充各种身体所需的维生素，但是不听医生建议盲目补充维生素对身体会产生伤害。

1. 考查冠词词义辨析。因此，虽然维生素补充剂很贵，但在那些担心自己得不到足够维生素的人中间很受欢迎。As a result 意为结果，为固定短语。故选A。

2. 考查动词词义辨析。句意：但是医学专家几乎没有_______证据显示大多数的补品能改善健康或者预防疾病。found发现；made制作；caught抓住；served服务。结合句意可知此处为医学专家发现几乎没有证据证明补品有作用。故选A。

3. 考查名词词义辨析。句意：_______，医学专家警告一些维生素吃太多对身体有害。cash现金；fact事实；danger危险；colour颜色。结合句意可知此处表示“事实上”，in fact为固定短语。故选B。

4. 考查动词词义辨析。句意：比如，太多维生素E能_______出血。choose选择；check检查；cause引起；carry搬运。结合语境和联系常识可知，太多维生素E会引起出血。故选C。

5. 考查形容词词义辨析。句意：人们应该和医生讨论他们要补充的维生素，因为一些维生素和药物混合使用时能产生________影响。harmful有害的；helpful有帮助的；hopeful有希望的；careful仔细的。根据前文“taking too many of some vitamins can be harmful”可知此处一些维生素会产生有害的影响。故选A。

6. 考查情态动词词义辨析。句意：然而，专家说维生素有时_______帮助预防疾病。should应该；will将；can能；must必须。结合语境可知此处在讲述维生素能够帮助预防疾病应用情态动词can。故选C。

7. 考查代词词义辨析。句意：那些知道缺乏具体维生素的人应该吃维他命补品。they他们；she她；he他；it它。分析句子结构可知此处代词指代句中people，所以应用代词they。故选A。

8. 考查动词词义辨析。句意：比如，一些老人可能没________足够的维生素B12。start开始；change改变；have有；think认为。根据后文老人失去吸收维生素B12的能力，可知此处指他们没有足够的维生素B12。故选C。

9. 考查从属连词词义辨析。句意：这是________当人们变老时，身体就失去了从食物中吸收维生素B12的能力。if如果；because因为；since自从；when当……时。结合语境可知此处在讲述老人缺乏维生素B12的原因，所以用从属连词because。故选B。

10. 考查介词词义辨析。句意：同样，长期在室内的人们也需要一些额外的维生素D，因为皮肤______阳光中制造这种维生素。in在……里；on在……上；at在；from从……。结合语境可知皮肤从阳光中制造维生素D。故选D。

11. 考查名词词义辨析。句意：不同的维生素在不同的_______中被发现。place地点；food食物；style风格；form形式。结合后文所举例子可知此处指在不同的食物中有不同的维生素。故选B。

12. 考查动词词义辨析。句意：甘薯、胡萝卜和其他的深色水果和蔬菜包含了身体能_______为维生素A的物质。change改变；break打破；throw丢，扔；look看。change into表示“把……变成……”，为固定短语。故选A。

13. 考查名词词义辨析。句意：维生素B12在绿色叶子的______和其他食物中被发现。noodles面条；milk牛奶；vegetables蔬菜；meat肉。结合语境可知此处绿色叶子的蔬菜。故选C。

14. 考查副词词义辨析。句意：维生素K能在猪肉制品中_______被发现。secretly秘密地；proudly自豪地；naturally自然地，easily容易地。结合语境可知在猪肉制品中能容易地发现维生素K。故选D。

15. 考查动词词义辨析。句意：对于大多数人来说，均衡的饮食能确保我们身体_______的维生素。need需要；spread传播；start开始；leave离开。结合语境可知均衡的饮食能确保身体所需要的维生素。故选A。