B

     The Camp Invention Program will be held through July at the Hillcrest Intermediate School, North Huntingdon. It exposes children to science, technology, engineering and maths (STEM) through hands-on activities.

     The Camp Invention Program, created by Invent Now Kids, was founded in 1990. Now it has grown to include almost l,500 sites across the U. S., with thousands of children attending the program each year.

     "Our main purpose is to help children develop a greater interest in the fields of STEM," said Lori Bryne, the Senior Regional Program Manager. Children in the camp will be given the opportunity to explore the unknown and put ideas into practice.

     The program will challenge children to real world situations that will help them build a team spirit and life skills.

     The program will include five modules this year.

     One module will feature "Problem Solving on Planet ZAK". It will challenge children by creating a world of science fiction. Imitating a "crash" onto a planet, children will be asked to figure out ways to stay safe, find food and to "rebuild" their spacecraft, using a variety of common objects.

     Another module will be "Saving Sludge City" which will have children find ways to create a cleaner and eco-friendly city.

    "Imagination Point Ride Physics" asks children to work as interns (实习生） in the world's newest and largest theme park called "Imagination Point". Children will learn the basic principles of motion through hands-on activities related directly to rides.

     Another feature of the camp will be the "I Can Invent" which will focus on the real world of inventions by having children explore the process of invention.

     The final module will be "Global Games" which will introduce games ranging from those played in ancient times to the present day to children.

     "We want to encourage children to go into the fields of STEM," Bryne said. "This program is a fun way to do that."

46. According to the text, the Camp Invention Program_____.

    A. has rapidly developed

    B. is held every other year

    C. was organized by Lori Bryne

    D. has been in existence for 24 years

47. The program was mainly created to help children _____

    A. put their ideas into practice

    B. learn more about the real world

    C. develop interest in the fields of STEM

    D. master the skills they need to live in society

48. What can we learn about "Problem Solving on Planet ZAK"?

    A. It encourages children to write science fiction stories.

    B. It introduces many ancient games to children.

    C. It asks children to work together to deal with an air crash.

    D. It challenges children to build a spacecraft using common objects.

49. Which feature of the camp can make children learn the basic principles of motion?

    A. I Can Invent.                          B. Imagination Point Ride Physics

    C. Global Games.                         D. Saving Sludge City.

50. What is the main idea of the text?

    A. The way to encourage children to create things.

    B. How the Camp Invention Program was created.

    C. Why the Camp Invention is welcomed by children.

    D. How the Camp Invention Program encourages children.

C

     The cattle egret (黄头鹭)  has lived in American continent in recent years. Non-native species are a worldwide problem and studies are devoted to assess the damage they cause to local species populations. The cattle egret primarily lives on the grassland and feeds in close association with animals like cattle and sheep. This bird is native to Africa, southern Europe and western Asia. The cattle egret in Brazil is unlike a number of bird species that have been established and expanded to non-native areas through human assistance.

     The first sight of the cattle egret in the New World were reported between 1877 and 1882, followed by sightings in British Guiana and Colombia and later expansion throughout the Americas. In Brazil, the cattle egret was first recorded in the northern region of the country in 1964, feeding along with buffalos on Marajo Island in the state of Para.

     While the cattle egret is not currently a threat to native animals and birds in Brazil throughout most of its geographic distribution, it has the potential to produce bad effects, as evidenced by its occupation of island environments. For example, in the Fernando de Noronha archipelago, the cattle egret drives adult native seabirds away from their nests in producing time.

    Understanding how the cattle egret settled and lived in Brazil is important for the better understanding of spreading patterns of bird populations and their interaction with the local species. Explaining the egret cattle's settling in the Americas is a challenging task due to the lack of sufficient information and reports on entrance time, location, and number of events. Comparisons between native and non-native populations can provide a 'natural' experimental way to clarify the biological and environmental factors that may contribute to range expansion and adaptation to climate change, and to find how animals respond to strange and sudden ecological and environmental pressures.

51. According to Paragraph l, which of the following is true?

    A. Like most birds, the cattle egret lives on worms.

    B. With human help, the population of cattle egret is large.

    C. The cattle egret may do harm to native species.

    D. The cattle egret often plays and sings on trees.

52. In America, humans first found the cattle egret ______

    A. in the 1870s.                  B. in Colombia

    C. in British Guiana              D. in the 1960s

53. Why does the writer refer to native seabirds in Paragraph 3?

    A. To prove the cattle egret caused a disaster to native birds.

    B. To warn people of the population of the cattle egret

　　　C. To tell people the cattle egret will do damage to native birds.

    D. The native seabird attracted the cattle egret to the new world.

54. The research on the American cattle egret

    A. must be meaningless to other animals.

    B. will mainly take place in the laboratory.

    C. should be very easy due to the existing fact.

    D. can help discover how animals adapt to the environment.

55. The text is likely to be selected from a column about

    A. society     B. nature       C. geography    D. history
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