Read the following article and select the best answer. Article: Boris Worm of Dalhousie University in Nova Scotia, Canada, led the international team that did the study. Professor Worm says species have recently been disappearing from oceans at increasing speed. At this rate, he says, all seafood species could collapse by 2048 and seafood supplies from the world's ocean could be almost gone by then. Other studies have also warned about the dangers of overfishing and the effects on ocean environments. But not everyone thinks the oceans are likely to be empty in fifty years. Some scientists said parts of the world do have problems, but others are doing a good job of protecting fish populations. Government officials in several countries with large fishing industries also questioned the research. The study appeared earlier this month in Science magazine. The researchers say damage to oceans affects not only fish populations but also the productivity of ecosystems. These complex systems help control water quality. The scientists say the loss of different kinds of sea life appeared to increase the risk of fish kills and beach closures from harmful algae growth. The scientists examined the results of thirty-two experiments and observed forty-eight protected areas. They also looked at records of catches worldwide. They studied records from the United Nations Food and Agriculture Organization for nineteen fifty to two thousand three. And they examined archeological information and other historical records for twelve coastal areas. That research reached back over a thousand years. Boris Worm says the findings were, in his words, "beyond anything we suspected." But he also said the situation is not too late to correct. He said that with good fisheries management, some species could completely recover in three to ten years. Question: The conclusion of the research led by Boris Worm is _ . - unbearable - unbelievable - doubtful - Convincing
Convincing

Read the following article and select the best answer. Article: John Smith was a writer, who wrote detective stories for magazines , though he never dealt with criminals . One evening he could not finish an end for a story. He sat in his study , but he had no ideas. So he decided to go to the cinema. When he came back, he found that he had had a visitor. Someone had broken into his house. The visitor had had a drink, smoked several of his cigarettes and had read his story. The visitor left him a note. "I have read your story and I don't think it is very good. Please read my suggestions and you can finish it. By the way, I am a thief. I'm not going to steal anything tonight. But if you become a successful writer, I will return." John read the thief's suggestions. Then he sat down and wrote the rest of the story. He is still not a successful writer, and he is waiting for his "visitor" to return. Before he goes out in the evening, he always leaves a half-finished story in his study. Question: John went to the cinema because _ . - he was too tired - he wanted to look for a thief - he could not finish his story and hoped to get some ideas - he wanted to enjoy himself in the cinema
he could not finish his story and hoped to get some ideas

Q: Read the following article and select the best answer. Article: Millions of people die of hunger in southern Africa every year, but when Zambia was offered thousands of tons of free maize by the US, the government politely said no. "We don't know whether the food is safe," said Zambia's commerce, Trade and Industry Minister Dipak Patel. His worries are shared by countries around the world that are in two minds about America's genetically modified(GM,)crops.Just last week, EU member nations were discussing whether or not to import GM sweet corn from the US. Ever since people started farming, they have tried to crossbreed plants to make them stronger or better tasting. At one time, only related plants could be crossed with each other. But when GM techniques were developed in the 1970s, scientists were able to put a single gene from a living creature into an unrelated creature. This means they can make crops more productive and resistant to disease by adding genes from other species.They can also create food with special characteristics, such as "golden rice", which is enriched with vitamin A. But many people believe GM foods are a health risk. At the moment, the official argument is that GM foods "are not likely to present risks for human health". But there are still many questions to be answered as the foods are produced in different ways. Some experts believe the genetic material added to plants can transfer to humans and give damage to our bodies. Further harm could be caused by the genes from GM plants crossbreeding with naturally produced crops. People in China are also getting worried about GM foods. More than 70 percent of the country's soybean oil is produced from imported GM soybeans. Meanwhile, an investigation last November found that 12 of 60 famous foods sold across the country were GM products. The government has begun to introduce a marking system for GM goods so that people can choose whether or not to eat them. Question: What's the author's attitude towards GM foods? - Supportive. - Neutral. - Doubtful. - Critical.
A: Neutral.

*Question*
Read the following article and select the best answer. Article: This year some twenty-three hundred teen-agers (young people aged from 13-19) from all over the world will spend about ten months in U.S. homes . They will attend U. S. schools , meet U.S. teenagers , and form impressions of the real America . At the same time , about thirteen hundred American teenagers will go to other countries to learn new languages and gain a new understanding of the rest of the world . Here is a two-way student exchange in action . Fred , nineteen ,spent last year in Gemany with George's family . In turn , George's son Mike spent a year in Fred's home in America . Fred , a lively young man , knew little German when he arrived , but after two months' study , the language began to come to him . School was completely different from what he had expected-much harder . Students rose respectfully when the teacher entered the room . They took fourteen subjects instead of the six that are usual in the United States . There were almost no outside activities . Family life , too , was different . The father's word was law , and all activities were around the family rather than the individual. Fred found the food too simple at first . Also , he missed having a car . "Back home ,you pick up some friends in a car and go out and have a good time . In Germany , you walk , but you soon learn to like it ." At the same time , in America , Mike , a friendly German boy , was also forming his idea . "I suppose I should criticize American schools ." He says , "it is far too easy by our level . But I have to say that I like it very much . In Germany we do nothing but study . Here we take part in many outside activities . I think that maybe your schools are better in training for citizens . There ought to be some middle ground between the two ." Question: The whole exchange programme is mainly to _ . - help teenagers in other countries know the real America - send students in America to travel in Germany - let students learn something about other countries - have teenagers learn new languages
**Answer**
let students learn something about other countries