Many kids turn up their noses at the thought of eating fish because, well, it can smell "fishy". While it is usually a healthy source of protein in the diet, there may be several reasons to avoid biting into a forkful of fish. Before you break out the tartar sauce, learn some facts about fish to keep yourself and the environment healthy. Some fish may contain harmful chemicals, which can be the result of both natural causes and water pollution. Mercury is a poisonous chemical, which occurs naturally in oceans and the Earth's crust, but also comes from man-made sources, such as pesticides, burning garbage, and the releasing of fossil fuels. Polychlorinated biphenyls (PCBs), a group of chemicals, can also be found in some fish. These dangerous man-made chemicals were used in many industries until 1977, when they were banned. PCBs were released or leaked into the air and water and have been transported around the globe. How do mercury and PCBs end up in fish and the food supply? When they are released into the air, they attach themselves to particles. These particles settle on the ground and in the water and are eventually eaten by microscopic organisms. Small fish eat the micro-organisms, and large fish eat the small fish and on up the food chain. Because they can negatively affect your health, the U.S. Environmental Protection Agency advises that kids younger than 15 years old avoid fish that contain high levels of mercury and PCBs. These include shark, swordfish, king mackerel, and tilefish. There are also many types of fish that are good for you, but because of overfishing are in danger of being wiped out. Some are being fished in the wild so much that they cannot reproduce fast enough to survive. Others are being farmed in ways that are not environmentally friendly. These fish include red snapper, Atlantic salmon, blue-fin tuna, and king crab. Despite these problems, there are several fish that are both healthy and sustainable, such as Alaskan salmon, American catfish, Pacific cod, and several farm-raised... It can be inferred from the passage that_. A) children like eating fish because it smells fishy B) if you want to be more environmentally friendly, eat less fish C) PCBs were not allowed to be used in food industry before 1977 D) adults might be less affected by high chemical levels in fish
D
(Question)
In most countries in the world, governments require children to attend schools in which trained teachers are responsible for educating the children using an approved curriculum. However, a sharply increasing number of parents believe that it is much better for their children to be educated at home by the people who know them and their needs best. Today, it is estimated that about one million home schooled children in the United States and tens of thousands of other learners around the world are learning outside of school. Now that home schooling is growing worldwide, the real-world experiences of learners show that schools are not always necessary for learning. Therefore, an increasing number of parents are deciding that home schooling is the best option for their children. They are unhappy with the quality or depth of education offered in the schools, or have other reasons why they feel that conventional schools (some people would rather call "normal schools" or "traditional schools") are not suitable for their children. One reason is social factors. Parents worry that their children will suffer from bullying or will be forced into bad behavior by peer pressure. They believe that the good behavior they have taught the child will be lost in school. Another reason is concern over the quality of schooling available. Schools frequently have large classes and they are often under-funded and stuffed with teachers without sufficient knowledge of their subjects. In the third place, other parents may disagree with the aims of the school curriculum, preferring for academic, social or cultural reasons to keep their children separate. However, there are many arguments in favor of sending children to conventional schools. The first is that the children will be exposed to other children. And they will interact with each other and develop social skills. A second point is that the children will learn to function outside the family. They will not be dependent on their parents for their educational, emotional and social... According to this passage, the author's attitude towards conventional schooling is _ . A) disapproving B) supportive C) puzzled D) suspicious
(Answer)
B
Ques:Most earthquakes occur within the upper 15 miles of the earth's surface, but earthquakes can and do occur at all depths to about 460 miles. Their number decreases as the depth increases. At about 460 miles one earthquake occurs only every few years. Near the surface earthquakes may run as high as 100 in a month, but the yearly average does not vary much. The extent of the disaster in an earthquake depends on many factors. If you carefully build a toy house with an erect set , it will still stand no matter how much you shake the table. But if you build a toy house with a pack of cards, a slight shake of the table will make it fall. An earthquake in Agadir was not strong, but it completely destroyed the city. Many stronger earthquakes have done comparatively little damage. If a building is well constructed and built on solid ground, it will resist an earthquake. Most deaths in earthquakes have been due to faulty building construction or poor building sites. A third and very serious factor is panic. When people rush out into narrow streets, more deaths will result. There is one type of earthquake disaster that little can be done about. This is the disaster caused by seismic sea waves, or tsunamis . These are often called tidal waves, but the name is incorrect. They had nothing to do with tides. In certain areas, earthquakes take place beneath the sea. These submarine earthquakes sometimes give rise to seismic sea waves. The waves are not noticeable out at sea because of their long wave length. But when they roll into harbors, they pile up into walls of water 6 to 60 feet high. The Japanese call them "tsunamis" meaning "harbor waves", because they reach a sizable height only in harbors. Tsunamis travel fairly slowly, at speeds up to 500 miles an hour. An earthquake warning system is in use to warn all shores likely to be reached by the waves. But this only enables people to leave the threatened shores for higher ground: There is no way to stop the oncoming wave. According to the passage, the waves caused by submarine earthquakes are not noticeable out at sea because of _ . A) their high speed B) the wide shores C) their silent movements D) their long wave length

Ans:
D