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Read the article and select the best answer. Article: As the population grows and temperatures rise, it will become more difficult to grow enough food for everyone. So, scientists are exploring the planet for plants that do not need as much water as today's crops. The Mojave Desert in the US state of California is home to some of these plants. Scientist Heather Rose Kates of the University of Florida is in that desert. She is searching along roads for a plant called coyote melon which is a kind of squash .Coyote melon may not taste good, but it can be grown in places that have little rainfall. The desert where it grows gets just 15 to 20 centimeters of rain per year, or less. Other kinds of squash need at least two and a half centimeters per week to grow. Scientists are considering combining wild coyote melon with regular squash to see if they can make a tasty vegetable that doesn't need as much water to grow. That could be useful on a planet growing warmer and more crowded every day. Andy Jarvis works at the International Center for Tropical Agriculture. He says farmers will need to produce 50 to 70 percent more food by 2050 to feed the world. So, he says, researchers are studying the wild versions of farm-grown crops. But he says there is a problem. He says many wild versions of farmed plants are disappearing. He says they are threatened and scientists have not collected their seeds for future use. Scientist Kates is part of an international effort to gather these plants and save their seeds while it is still possible. Workers are collecting wild potatoes in Argentina and wild peppers in Para-guav. The plants and seeds will be sent for storage to the Global Seed Vault in Norwav and at Kew gardens in Britain. Ms Kates spends most of her time in a laboratory. She says gathering plants has helped her understand more about them. Question: Scientists want to combine wild coyote melon with regular squash in order to _ . Options: A: feed the people all around the world B: keep the earth from becoming warmer C: create a new fruit instead D: produce a delicious vegetable with less water to grow
(Answer)
D

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Read the article and select the best answer. Article: In the past,when people had problems,they went to their families or friends to get advice.Today it is possible to get advice from radio shows.TV programs or telephone hot lines,too.A hot line is a telephone line that offers a direct way of getting in touch with advicers.Most hot lines are completely anonymous --callers do not have to say their names or telephone numbers.Most hot lines are usually free,too.Callers do not have to pay for their advice or the phone calls--even if the calls are long distance.At some hot lines,the advicers are volunteers.Other hot lines pay their advicers for their work.Usually the advicers are full-job people with years of education and experience,but sometimes the advicers have only taken a short class before starting to work on the hot line.All the advicers listen to the people and help them solve their problems. Question: A hot line is a telephone line _ . Options: A: that is hot B: through which people get advice C: whose number no one knows D: through which callers take a short class
(Answer)
B

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Read the article and select the best answer. Article: My son and I were trying to sell the house we had repaired, but in the barn there were bats and they would not leave. The barn was their home. They told us so in their own way they hung for the season. "Don't worry about it, Dad." Patrick said. "They keep down the mosquitoes ." Unfortunately they also kept the buyers away. When we had asked a person to sell the house for us he had refused to show it because of the bats. "Bats are popular," Patrick comforted me. "They are ecological." "Isn't there a machine you can buy that produces high-frequency sounds to keep bats away?" " I don't know," said Patrick. "But I like bats, and whoever buys this house will probably like them too.' "Probably?" I hated that word. "How many bats are there, anyway?" "I counted about 90 last night," said Patrick. "They were dropping out from under the edge of the roof." "You mean there are more------outside?" "They're everywhere, Dad. But look at it this way. When the cold weather comes, they'll be off to Mexico. Maybe in the spring we can keep them out. Don't worry about it," he said for the the hundredth time. "It's not a problem." The bat expert I called was even more active than Patrick. "I think you've got a large number there," he said in wonder. "I've been trying to attract bats to our house for 25 years. A single bat ears up his weight in mosquitoes and black flies three times every night. You've a very lucky man." I offered to share my luck with him. He could take them away. "Bats have a remarkable homing instinct ," he said. "They'd fly straight back even if I transported them 100 miles. Once they have settled, you can't stop them from coming back." I was silent. Finally we managed to rent the house to a young family, who were also interested in buying it. "What about the bats?" I said to Patrick. "Oh, they love the bats," he said. "No mosquitoes. No black flies. It's one of the things that attracted them." "Do you think they will really buy the house?" "Probably? Well, if they do, I suppose I'll have to admit that I was... Question: What did Patrick suggest the author should do to stop the bats living in the barn? Options: A: Buy a high-frequency machine. B: Close the barn in the spring. C: Reduce the number of mosquitoes. D: Move them one hundred miles away.
(Answer)
B