Read the following article and select the best answer. Article: Norman Cousins was a businessman from the United States who often traveled around the world on business. He enjoyed his work and traveling. Then, after returning to the United States from a busy and tiring trip to the Union of Soviet Socialist Republics( USSR),Mr. Cousins got sick. Because he had pushed his body to the limit of its strength on the trip, a chemical change began to take place inside him. The material between his bones became weak. In less than one week after his return, he could not stand. Every move that he made was painful. He was not able to sleep at night. The doctore told him that they did not know how to cure Mr. Cousins ' problem and he might never get over the illness. Mr. Cousins, however, refused to give up hope. Mr. Cousins thought that unhappy thoughts were causing bad chemical changes in his body. He did not want to take medicine to cure himself. Instead,he felt that happy thoughts or laughter might cure his illness. .' He began to experiment on himself while still in hospital by watching funny shows on television. Mr. Cousins quickly found that 10 minutes of real laughter during the day gave him two hours of pain -free sleep at night. Deciding that the doctors could not help him, Mr. Cousins left the hospital and checked into a hotel room where he could continue his experiments with laughter. For eight days,Mr. Cousins rested in the hotel room watching funny shows on television,reading funny books,and sleeping whenever he felt tired. Within three weeks,he felt well enough to take a vacation to Puerto . Rico where he began running on the beach for exercise. After a few months,Mr. Cousins returned to work. He has laughed himself back to health. Question: Why did Norman Cousins get sick? - He did not rest enough. - He traveled too much. - His body chemistry changed. - All of the above.
All of the above.

Read the following article and select the best answer. Article: Ants have a reputation for strength,organization and teamwork.But researchers have now discovered that a key secret to the success of ants is their ability to identify the importance of age in the work place. A study of Gentral American leaf-cutter ants has shown that the younger and stronger members are give the toughest job of cutting therough the leaves they harvest.Their sharp youn teeth do this job effectively,but as they get older their teeth become relatively worn and _ . But rather than being retired or abandoned by the group,the ageing ants are given a new role more suyted to their physical abilities.They become carriers and teansport the leaves back to the kingdom where they are harvested for food. The findings by researchers from the University of Oregon and the Oregong State University support previous research showin the survival of a leaf-cutter kingdom depends on the efficiency of is workers. "Cuting leaves is hard work,"said Dr.Robert Schofield,who led the research team."Much of the cutting is done with a V-shaped blade between teeth on their jaws.This blade starts out as sharp as the sharpest razor blade that humans have developed."But over rime the teeth become blunter and the cutting job slows down.The team estimated that,because of this age-related wear,a colony spent twice the energy cutting leaves than it would if all the ants had sharp blades.Its findings support the idea that wear and break can be significant problems for insects as well as largre animals. Like humans,leaf-cuttre ant recognize that older members of the group can still make a worhwhile contribution to society."This study shows an advantage of social living that we are familiar with,"said Dr.Schofield. Question: The younger and stronger ants do the toughest job because _ . - they can teansport the leaves effectively - they have a sharp blade to cut leaves - other members are busy with other work - they can finish the job in a better organized way
they have a sharp blade to cut leaves

Q: Read the following article and select the best answer. Article: Dear Mayor, I would like to draw your attention to the depressing state of the environment in our city. Increased vehicles have made the air polluted. Citizens find it difficult to breathe. Dumping toxic chemicals into the river has polluted the drinking water and ground water. All of us, as concerned citizens, have discussed these problems in various meetings. We have come up with the following proposals . The green roads are no longer green. Many trees and bushes have been cut. We propose restricting the movement of vehicles. Besides, we should make it compulsory to use anti-pollution devices on all vehicles. We should also plant more plants and trees along roads. The Bada Nadi River has become a dumping ground of toxic chemicals from some factories. These toxic chemicals have killed nearly all the life in the river and polluted our drinking water and ground water. We propose that the Bada Nadi River be declared a protected water body. All the dumping should be banned and heavy fine should be imposed on the offenders . To _ the problem of managing toxic waste, we propose setting up a water treatment plant so that only clean water is discharged into the river. Cleaning up the river and introducing various fishes and plants to the river will bring it back to life. Lastly, the noise pollution caused by honking horns and blaring loudspeakers has caused distress to one and all. Many people have suffered from noise-related illnesses. We propose a blanket ban on the use of loudspeakers. And"no horn zones"should also be declared in residential hospitals and school areas. I would request you to seriously consider our proposals and act accordingly. Thank you! Sincerely yours, A kind-hearted citizen Question: The author wrote this letter in order to _ . - express his/her thanks to the mayor - complain about the environment - share his/her opinions about city life - make his/her suggestions on managing toxic waste
A: complain about the environment

*Question*
Read the following article and select the best answer. Article: Children today spend less time outdoors than ever before and it may be harmful not only to their physical health, but also to their cognitive development. A year-long study, recently published in the Sciences, found that elementary school children who were exposed to more green space within or directly outside their school showed improved learning and memory. The findings reinforce that of a recent six-year study on 905 Massachusetts public elementary schools, which found that students in schools that had more "greenness" in their surroundings reported higher scores on standardized testing in English and math. "There is an expanding body of scientific evidence linking the human experience in the natural world to better physical and mental health and improved cognitive abilities," journalist Richard Louv, co-founder of the Children & Nature Network, said in an email to The Huffington Post. "An increasing number of homeschoolers, nature preschools, independent primary and secondary schools, and forward-thinking public schools are incorporating nature experience into learning." The new study was conducted on more than 2,500 children in second, third and fourth grade at 36 primary schools in Barcelona, Spain. Researchers found that the students who attended schools with more green space showed a 5 percent improvement in the short-term memory that's critical for reasoning, learning and comprehension. But their inattentiveness decreased slightly. Spending time outside could have a number of benefits for children beyond improved memory and attention. Another recent study found that adventurous outdoor play such as climbing, rough and tumble play, and exploring alone improves children's physical health while also help them develop creativity and social skills greatly. Some schools are starting to take notice, creating more space for children to enjoy being in nature, including community gardens, outdoor playgrounds and small parks. Question: Spending time in green space may have little effect on children's _ . - inattentiveness - creativity - communication - learning
**Answer**
inattentiveness