A
Did you know that you have millions of tiny things living inside of you? They are called microbes.Microbes live all over our bodies.They come in a huge variety of shapes.They can move around and communicate with each other.They are so tiny that the only way to see them is with a microscope (显微镜)．Bacteria, fungi (真菌), and viruses are examples of microbes.
“Microbes can be found everywhere in our bodies and all over Earth，” Marie SamanovicGolden said.She is a scientist who studies microbes.“Understanding them is necessary for understanding our body.”
Scientists have known for years that some microbes cause diseases.Recently, by using new advances in technology, scientists have collected more information about microbes.They have learned that many microbes play a major role in fighting diseases.
“We know that microbes are important for our immune (免疫的) system，” says Susan Perkins，a scientist at the American Museum of Natural History (AMNH), in New York City.She is an organizer of The Secret World Inside You, a new show on microbes.At the AMNH show, visitors can use videos and a live theater presentation to explore how microbes influence health.
According to Perkins what we eat affects what kinds of microbes we have inside of us, and it is important to have many kinds of microbes.Microbes in the digestive tract (消化道) help digest food.In the mouth, they protect teeth from cavities (蛀牙)．Microbes also make vitamins.
“We are learning so much about microbes all the time，” Perkins said.“We have far more helpful microbes than harmful ones，” she says.
【解题导语】 本文是一篇说明文。文章主要介绍了微生物。
1．What can we learn about the new study on microbes?
A．Scientists have found their positive role.
B．Scientists have collected new microbes.
C．Scientists have used them to cure diseases.
D．Scientists have found ways to balance them.
A 解析：细节理解题。根据第三段中的They have learned that many microbes play a major role in fighting diseases.可知，科学家发现了微生物所起的积极作用。
2．What can visitors do at the AMNH show?
A．Watch videos about the museum.
B．See a healthy world inside people.
C．Explore people’s immune system.
D．Learn about microbes in different ways.
D 解析：细节理解题。根据第四段中的visitors can use videos and a live theater presentation to explore how microbes influence health可知，在该展览中，人们可以通过观看视频等方式了解微生物。
3．Perkins’ words show the relationship between________．
A．food and health
B．microbes and health
C．good and bad eating habits
D．helpful and harmful microbes
B 解析：推理判断题。根据倒数第二段中的Microbes in the digestive tract(消化道) help digest food...Microbes also make vitamins.及最后一段中的We have far more helpful microbes than harmful ones可知，Perkins主要谈论了微生物与健康的关系。
4．What’s the best title for this text?
A．Tiny Helpers
B．Shows on Microbes
C．A Secret Exploration
D．A System in Our Body
A 解析：标题归纳题。根据文中对人类健康的小小帮手——微生物的介绍可知应选A项。
