The spots on a fawn's coat let it hide in shady areas without being seen. The viceroy butterfly looks like the bad-tasting monarch, so birds avoid both. The hognose snake hisses and rolls on its back when it fears another animal. When the opossum is attacked, it plays dead. Distressed turtles hide in their shells until they're sure it's safe to come out again.
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 Because lambs are sometimes eaten by coyotes, ranchers may hunt or trap the coyotes. However, killing coyotes may upset nature's balance. Scientists have found a way to protect sheep without killing coyotes. Coyotes are fed lamb meat treated with a drug. When they eat the meat, they get sick. Later, coyotes won't even go near lambs. They'll hunt rabbits instead. The paragraph mainly tells.......

 The temperature in Antarctica once fell to 128 degrees below zero Fahrenheit. In the summertime, temperatures average well below freezing. Most of the land is covered with ice that is up to two miles thick. Only a few strong mosses and sturdy spiders can live on this big block of ice. Since very little snow or rain falls there, Antarctica is a desert.
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For years food chemists have tasted hot peppers used for chili sauce, catsup, and pizza, but people had a hard time figuring out the spiciness of the peppers. After eating two or three, their taste buds were burning. Now a machine can test different kinds of hot peppers. It measures the chemicals that provide the spicy taste of the peppers.
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 The rare Chinese panda lives on tender, young bamboo shoots. Most bamboo plants die right after flowering. Without the bamboo the pandas starve. Because some people fear that the rare pandas may die out, in some places food is given to the hungry animals. Some pandas are airlifted to places where bamboo is still plentiful. The paragraph mainly tells.......

 In real life, rattlesnakes try to avoid people and seldom attack. Most people are bitten only after they step on these snakes. A rattlesnake may not even inject its poison when it bites. In fact, more Americans die from insect stings than from snakebites.
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Air plants, such as mosses and lichens, grow on buildings and stones and get their food and water from the air around them. Other plants such as mistletoe get their food and water from the trees they live on. Sometimes these trees die if the plants take away too much food or water.
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     Alfred Nobel invented dynamite to help builders, but it was used for war, which made hm feel very guilty about the misuse of his invention. He was a rich man so he set up a $9 million fund. Today the fund is used to reward people who have improved human life. Nobel Prizes are awarded in six fields, including peace, medicine, and chemistry.
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 Bob Geldof talked to the top musical talents of the world and asked them to sing at a concert to raise money. The stars agreed. Geldof found a stadium, arranged for TV coverage, and set up a trust fund. He said that none of the stars would get special treatment. Everyone would work together. In 1985, the Live Aid concert raised more than $100 million for starving children.
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Garlic is one of the ingredients that makes pasta sauce taste so good. Now doctors think garlic has healing powers, too. Early tests show that it can kill harmful germs. Garlic also has been found to have a good effect on the blood. Doctors think it can help protect people against heart disease.
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 Sharks have a keen sense of hearing and can smell blood from almost 2,000yards away. Sharks also have a special system of channels in their skin that helps them feel the vibrations of a splashing swimmer. We know that in clear water, sharks can see dinner from about 50 feet away. If you ever spot a shark, always swim away smoothly!
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 Virginia Hamilton started writing at a young age. People in her family were great storytellers. She loved to listen to their tales about her African American heritage. When she grew up, Hamilton brought the tales to life in stories. Now she is a famous writer of books for children.
The paragraph mainly tells....... a what kind of tales Hamilton's family told. b how Hamilton's family told stories. c when Virginia Hamilton started writing. d when Virginia Hamilton started writing.

 Every year hungry deer do millions of dollars' worth of damage to young pine trees. Scientists in Washington have found a way to protect the trees. They use a substance called selenium. Selenium produces a bad smell when dissolved. A bit of this element is put in the ground near trees. Rain dissolves the selenium, and the trees absorb it. The bad smell keeps the deer away until the trees are fully grown.
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