Read the following article and select the best answer. Article: Elephants scored a big win in 2010. Representatives from 175 countries at the United Nations' Convention on the International Trade in Endangered Species (CITES) in Doha, Qatar, rejected a bid to allow the sale of ivory. Two African nations, Tanzania and Zambia, had asked to open the ivory trade. Conservationists feared that weakening a 21-year-old ban on the sale of ivory would have encouraged illegal hunting and hurt elephant populations. African elephants once numbered in the millions. Today, there are fewer than 500,000. "People born in 100 years should be able to see an elephant, " said Noah Wekesa, Kenya's minister of forestry and wildlife. His country voted to keep the ban. In the 1980s, as many as one million elephants were killed throughout Africa. Hunters killed the animals for their ivory tusks, which were used to make jewelry and other items. " The slaughter of elephants in Africa was just terrible, " says Paul Todd of the International Fund for Animal Welfare ( IFAW ). The group works to protect animals. The ivory wars continued until 1989, when CITES voted to ban all trade in ivory. With trade controlled, demand for ivory fell. Elephant populations began to increase slowly. Tanzania and Zambia asked CITES to allow ivory sales from government stockpiles . Ivory is so expensive that it's known as "white gold". Tanzania holds almost 200,000 pounds of ivory, which is worth as much as $20 million. Zambia has 48,000 pounds of the "white gold". The two countries argued that their ivory had been taken from hunters or had come from animals that died naturally. They said this income from the sale of ivory would help the countries. Wildlife experts, who believe that the ivory trade encourages illegal hunting, cheered the CITES decision. "It's a rare victory for elephants," said Jason Bell-Leask, the IFAW's director for southern Africa. Question: What can we infer from the passage? - The income of Tanzania is mostly from the hunting of elephants. - Most African representatives disagreed with the ban on the sale of ivory. - The elephant population may increase if the ban on the sale of ivory is maintained. - About one million elephants have been killed throughout Africa since 1980.
The elephant population may increase if the ban on the sale of ivory is maintained.

Read the following article and select the best answer. Article: Einstein was born in 1879 in Germany. As a child, he was slow to learn to talk. As a pupil, he was backward. But when he was fourteen years old, he became clever. He taught himself maths from textbooks. He studied hard because he wanted to be a physicist. In 1901, Einstein began teaching. In 1902 he continued his studies at the University of Zurich. Several years later, he formulated his famous Theory of Relativity .To most people the law of relativity is difficult to explain. But once Einstein explained it very well to a group of young students. He said, "When you sit with a good girl for two hours, you think it is only a minute. But when you sit on a hot stove for a minute, you think it's two hours. That is relativity." After Hitler came into power in Germany, Einstein went to America. In 1940 Einstein became an American citizen. In 1955, Einstein's life ended at the age of seventy-six. Question: The law of relativity is _ . - very hard for most people to understand - too hard for Einstein himself to explain - too hard to explain to anybody except Einstein - easy to understand only for the young students
very hard for most people to understand

Q: Read the following article and select the best answer. Article: Electronic books have changed the way many people read for pleasure. Now online textbooks are changing the way some students learn and some teachers teach. More than one hundred seventy-five thousand students attend the public schools in Fairfax County, Virginia, outside Washington. Last year, the school system used digital books in fifteen schools. This school year, middle schools and high schools changed from printed to electronic textbooks in their social studies classes. Luke Rosa is a history teacher at Falls Church High School. His students work on laptop computers at school. He explains the idea to them this way. "I mean, it's just like a regular textbook, except it's got it all online." Peter Noonan, an assistant superintendent of schools, said, "The world's changing. And the online textbooks can change right along with the events that are happening." Digital books also cost less than printed textbooks, he said. A student named Melanie Reuter said, "I don't have to carry a textbook around, so that's nice." But another student said, "I don't like it because the Internet sometimes doesn't work." Students also need access to the Internet when they are not at school. About ten percent of students in Fairfax Country do not have a computer or online access at home. Public libraries in the country have free Internet. There are also after-school computer labs as well as computer clubhouse supported by the country. Middle school student Slieman Hakim is happy about that. He said, "My family only has one computer; my sister and I both do our homework on it. So I come here to do my homework. It's good." Other school systems in the area are also considering online textbooks. Question: Why does Slieman Hakim feel happy? - He is offered a free computer to do his homework. - He doesn't have to do his homework at home. - He has access to the Internet to study at any place. - He needn't share a computer with his sister to do homework.
A: He needn't share a computer with his sister to do homework.

(Q).
Read the following article and select the best answer. Article: Barbara and Barry Zucker - Pinchoff, both doctors from New York City, took their three daughters on a walking safari last year in Tanzania. Barbara told about their experience in Kinbero, "It is the most remote place we have ever been to," camping with a few other Americans, two Tanzanian guides, and several Hadza who had time to sit and chat because they had just killed a giraffe. About 400 members of the Eastern Hadza tribe live in Tanzania today, the only hunter-gatherers who remain in Africa. The Hadza hunt game, gather edible plants and honey, and move from place to place whenever the weather changers. Every two weeks or so, they move to a new campsite. At the Pinchoffs' campsite, three Hadza men stopped by to visit and ended up staying three days. One of the guides gave the men a cigarette. They took out the tobacco, put it in a pipe, and lit the pipe with fire they started. It takes less than two hours for Hadza women to build a new camp. They make huts by bending branches into round structures about six feet high, and then covering them with long, golden grass. If the weather is very wet, the women may choose a dry cave to set up a camp. Some rock caves have been used over thousands of years and are decorated with ancient rock paintings. Whether they sleep in huts, caves or in the open, the Hadza cover themselves only with thin cloths and depend on fire to keep them warm. The Hadza refuse to be "settled" into villages or to have the life of farmers. By 1979, almost all of them had returned to their old ways. They Hadza may be the only tribe in Africa the has never paid taxes. Question: Where do the Hadza live in wet weather? - On the farm. - In huts. - In caves. - In the open.
(A).
In caves.