Write a multi-choice question for the following article, with the given choices and answer: Article: There is a huge demand for shark fins in Asian countries. As a result, many sharks are caught and killed. In Palau, where more than half of tourists are drawn by diving excursions, each reef shark brings in about $179,000 in tourism revenue annually, or about $1.9 million during its lifetime. Due to overexploitation and lack of proper management, many shark species are under considerable risk of unrecoverable decline with some species having declined to near extinction in recent years. According to reports, sharks are being killed at an alarming rate of up to 273 million worldwide per year. Some experts predict that if the killing continues at the current rate many shark species will be lost forever. It can be very dangerous. Sharks are very important and they should be protected. In a study of the east coast of the United States, 11 species of sharks were eliminated from their range. Of the 14 species of ocean life that those sharks used to eat, the populations of 12 exploded and caused great damage to the ecosystem. For example, the cownose ray population was no longer kept under control by sharks and so grew out of control. As a result, the rays destroyed the population of bay scallops , their favorite food. The scallop fishery, which had been in good condition for over 100 years, was wiped out. Also, the removal of the scallops most likely had an effect on water quality as they were no longer there to perform their function of cleaning the water. Sharks play a vital role in the oceans in a way that the average fish does not. Most sharks serve as top predators at the pinnacle of the marine food pyramid, and so play a critical role in ocean ecosystems. Directly or indirectly they regulate the natural balance of these ecosystems. Sharks tend to eat very efficiently, going after the old, sick, or slower fish in a population, keeping that population healthy. Sharks help keep many populations of ocean life to the right size so that those prey species don't cause harm to the ecosystem by becoming too... Options: A Shark fins are in great need. B People kill them out of fear. C Sharks often attack swimmers. D Sharks break the balance of the sea. Answer: A Shark fins are in great need. Question:
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Answer: What's the main reason for killing sharks in Asia?

Q: Write a multi-choice question for the following article, with the given choices and answer: Article: One day, around Christmas time, fishermen off the west coast of Peru started on their traditional fishing trip. Much to their surprise, there were no fish! They knew immediately what had happened. Tales from years gone by had told them this was the result of El Nino which sometimes stop fishing for many months! El Nino is a warm _ that comes and goes along the west coast of South America. It got its name from fishermen in Peru more than a century ago. Every few years, they noticed a sudden warming in the normally cool Pacific water where they fished. Because this warming often came about around Christmas, they called it El Nino, which is Spanish for the "Christ Child". Generally, El Nino occurs every three to seven years and lasts only a few weeks to a month or more. El Nino warms the water it flows through. Because the fish and sea birds need cold water to live, many of them die when El Nino comes through. El Nino also causes both floods and droughts. It is believed that El Nino may have caused the 1993 Mississippi and 1995 California floods. And at the same time, it may have caused droughts in South America, Africa and Australia. El Nino has occurred thirteen times within the last fifty years, bringing natural disasters to many countries such as Indonesia and Peru. However, El Nino does not often trouble China. During this period China was badly hit by El Nino only once. In 1998, North China had a terrible drought, while South China was troubled by floods. Options: A rises in temperature of the sea water B diseases spreading around the world C floods and droughts D death of fish and sea birds Answer: B diseases spreading around the world Question:
A: If El Nino happens, the following will take place EXCEPT _ .

Write a multi-choice question for the following article, with the given choices and answer: Article: Common sense would tell us that physically active children may be more likely to become active and healthy adults. In the United States, elementary and middle schools are advised to give students two and a half hours of physical activity a week. That is what the Centers for Disease Control and Prevention and the American Heart Association recommend. They say high schools should provide about four hours of physical activity each week. Yet many schools across the country have reduced their physical education programs. Just this week, a study reported that life _ has fallen or is no longer increasing in some parts of the United States. The situation is worst among poor people in the southern states, and especially women. Public health researchers say it is largely the result of increases in fatness, smoking and high blood pressure. They also blame differences in health services around the country. In 2006, a study found that only four percent of primary schools provided daily physical education all year for all grades. This was true of eight percent of middle schools and two percent of high schools. The study also found that twenty-two percent of all schools did not require students to take any P.E. Charlene Burgeson , a health expert says one problem for P.E. teachers is that schools are under pressure to put more time into academic subjects. Also, parents may agree that children need exercise in school. Yet many parents today still have bad memories of being chosen last for teams because teachers favored the good athletes in class. But experts say P.E. classes have changed. They say the goal has moved away from competition and toward personal performance, as a way to build a lifetime of activity. These days, teachers often lead activities like weight training and yoga. Some parents like the idea of avoiding competitive sports in P.E. class. Yet others surely dislike that idea. In the end, schools may find themselves in a no-win situation. Options: A P.E. is the most important subject for all students. B P.E has changed its goal for some reasons in America. C It introduces us the present situation of P.E in American schools and its cause. D P.E can help students improve their academic subjects. Answer: C It introduces us the present situation of P.E in American schools and its cause. Question:
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Answer:
What is the main idea about this passage?