68.The author is in favor of _____________ according to the passage.

　　　 A．putting retarded children into institutions

　　　 B．providing early childhood education programs

　　　 C．keeping children in orphanages

　　　 D．keeping retarded children with others like themselves

67.What's the main idea of this passage

　　　 A．Retarded children cannot improve their IQ's.

　　　 B．Orphanages are full of mentally retarded children.

　　　 C．Environmental factors influence a child's IQ.

　　　 D．Early childhood education programs are important.

66．What did they these teenagers learn from the journey?

　　　 A．It was high time that people protected the environment.

　　　 B．Long journey was not suitable for school children.

　　　 C．It should take the whole world to help the children.

　　　 D．Environmental problems can be solved if school children take part.

D

　　　 How much can environment affect intelligence? In one study, striking increases in IQ occurred

in 25 children who were moved from an orphanage(孤儿院) to more stimulating(使人兴奋的，使人振奋的) environments．The children, who were all considered mentally retarded and unadoptable, were moved to an institution where they received personal attention from adults．Later, these supposedly retarded children were adopted by parents who gave them love, a family ,and a stimulating home environment．The children gained an average of 29 IQ points．For one child, the increase was an amazing 58 points．A second group of initially less "retarded" children, who stayed in the orphanage, lost an average of 26 IQ points.

　　　 Other encouraging results can be found in early childhood education programs, which provide

stimulating intellectual experiences for disadvantaged children．In one study, children from low-income families were given enriched environments from early infancy(婴儿期) through preschool．By age 2 their IQ scores were already higher than those in a control group．More important, they were still 5 points higher seven years later．High-quality enrichment programs such as Head Start can prevent children from falling behind in school.

　　　 A particularly striking environmental effect is the fact that 14 nations have shown average IQ

gains of from 5 to 25 points during the last 30 years．These IQ boosts, averaging 15 points, occurred in far too short a time for genetics to explain them．It is more likely that the gains reflect environmental forces, such as improved education, nutrition, and living in a technologically complex society.

65．It can be inferred that Earthwatch Institute could be _____．

　　　 A．an international university that takes in students from all over the world

　　　 B．a TV station that makes programmes on the beautiful scenery of the earth

　　　 C．a travel agency that organizes adventure trips specially for school children

　　　 D．an organization that brings science to life for people concerned about the earth’s environment

64．What’s true about their journey?

　　　 A．They had to pay for their journey at their own expense.

　　　 B．They often had to move from one hotel to another.

　　　 C．They had to take great pains to collect environmental information.

　　　 D．They received a warm welcome every time they arrived at a new place.

63．These teenagers went on the journey around the world _____.

　　　 A．to experience the most serous environmental problems on the earth

　　　 B．to bring the kindness of America to the other parts of the world

　　　 C．to go on sightseeing around the world

　　　 D．to call on more teenagers to join Earthwatch Institute

62．What’s the best title of the passage?

　　　 A．Wave of Immigrants to America

　　　 B．Make Fortunes Abroad

　　　 C．Hard Work Leads to Success

　　　 D．Changes of America’s Golden Dream

C

Have you ever thought, “I wish I could take a year off and just travel around the world”? Well,

three lucky American teenagers were able to do just that．The teens-two males and one female--got an all-expenses paid, yearlong hike to five continents.

　　　 This trip didn’t include any five-star hotels or shopping funs．Eighteen-year-old Jamie Fiel

from Keller, Texas, 17-year-old Arsen Ewing from Canyon, California, and 16-year-old Tyler Robinson from Lincoln, Massachusetts, didn’t expect fancy treatment．They signed up for the experience of a lifetime, which included hard work, often uncomfortable accommodations, and encounters with(遭遇) some of nature’s most dangerous animals and environments.

Jamie, Arsen, and Tyler were among hundreds of high school kids nominated by their science

teachers to take this trip．Earthwatch Institute sponsored this adventure．Each year, Earthwatch employs thousands of volunteers worldwide to help with scientific research projects．

The group went all around the world to get a close look at the most pressing environmental

issues of our time．Their assignments were as varied as their locations, and included measuring and attending pink flamingos in Kenya’s Great Rift Valley, and tracking giant sea turtles in Costa Rica.

As they worked with the Earthwatch scientists, Jamie, Arsen, and Tyler began to understand

that we are at a critical moment in the life of our planet．Time for change is running out．As the teens went from country to country and witnessed different environmental dangers and challenges, they understood that solutions to important environmental issues start with the power of one person's actions．They realized that each of them can make a difference.

61．The underlined sentence “his story can save the American Dream” (in the last paragraph) indicates that_____________．

　　　 A．the dream of seeking fortunate in America is easy to realize

　　　 B．most of the immigrants to America don’t reach their previous goals

　　　 C．the success of Arnold Schwarzenegger is among the common examples of the immigrants

　　　 D．the immigrants have made great contributions to California

60．Why did most of the early immigrants work as railroad laborers?

　 A．Because they could earn more money as railroad laborers?

　　　 B．Because they had to make a living by working as railroad laborers．

　　　 C．Because they thought railroad was the first step to find gold.

　　　 D．Because railroad laborers were greatly honored at that time.

59．It can be inferred that_____________.

　 A．America' s golden dream could never be realized

　 B．America's golden dream had bought great fortune to Chinese immigrants

　 C．different times have different themes of the American dream

　 D．determination and hard work are the best way to realize the American dream