Read the following article and select the best answer. Article: Unless we spend money to spot(,) and prevent asteroids now, one might crash into Earth and destroy life as we know it, say some scientists. Asteroids are bigger versions of the meteoroids that race across the night sky. Most orbit the sun far from Earth and don't threaten us. But there are also thousands of asteroids whose orbits put them on a collision course with Earth. But $500 million worth of new telescopes right now, then spend $10 million a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we'll have a way to change its course. Is it worth it? Two things experts consider when judging any risk are (i) How likely the event is; (2) How bad the consequences if the event occurs. Experts think an asteroid big enough to destroy lots of life might strike Earth once every 500,000 years. Sounds pretty rare but if one did fall. It would be the end of the world. "If we don't take care of these bid asteroids, they'll take care of us," says one scientist. "it's that simple." The cure, though, might be worse than the disease. Do we really want fleets(,) of nuclear weapons sitting around on Earth? "the world has less fear from doomsday rocks than from a great nuclear fleet set against them." Said a New York Times article. Question: We can conclude from the passage that _ - While pushing asteroids off course nuclear weapons would destroy the world. - Asteroids racing across the night sky are likely to hit Earth in the near future. - The worry about asteroids can be left to future generations since it is unlikely to happen in our lifetime. - Workable solutions still have to be found to prevent a collision of asteroids with Earth.
Workable solutions still have to be found to prevent a collision of asteroids with Earth.
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Read the following article and select the best answer. Article: On a hot African morning, Leila was lying on her stomach and an elephant was walking towards her. Leila waited. Then she pushed the button on her camera. "And I got my best photo of an elephant ever, by lying under my car," Leila explained. "I wanted to get close to the elephants, but of course this was dangerous; they had their babies with them. So every morning I used to park my car in the open near the path . They used to take the same path every morning when they left the water hole. After a week, they were used to seeing my car. So the next morning, I lay under it and got my photo!" Many of the best wildlife photos come from good planning. In Africa, photographers set up their hides near water holes. They also set up hides near forest paths, as animals use the same paths every night. For bird-watching, many lakes have hides. Inside the hides, bird-watchers can watch all day in the shade out of the wind and rain. Good wildlife photos are needed for books, postcards, magazines and newspapers. But a success rate of 1 in 20 is good. Question: How can photographers take good photos? - By making good preparation. - By going into the forest at night. - By walking around the holes. - By going to the nearest lake.
By making good preparation.
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Read the following article and select the best answer. Article: Greenland is the largest island in the world.It covers over 2,000,000 square kilometers.Most of the island lies inside the Arctic Circle ,and a huge sheet of icecovers 85% of its area. Along the sea mountains rising from the sea,there are a few low trees in the southwest,but no forests.In winter snow covers everything,but in summer very low plants cover the ground between the sea and the ice sheet.Norwegians were the first Europeans to see the island in AD 875,but no one visited it until 982.Three years later a few Norwegians went to live there.In 1261 the people in Greenland decided to join Norway.Norway and Denmark united in 1380.This union ended in 1814,and Greenland stayed with Denmark.Greenland is fifty times larger than Denmark,but it is still part of this small country. Question: When did Europeans begin to live in Greenland? - In AD 875. - In AD 982. - In AD 1261. - In AD 985.
In AD 985.
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Read the following article and select the best answer. Article: MSG (monosodium glutamate) is a food additive , which has been widely used by many food factories all over the world since it appeared first in Japan in 1909. MSG is a _ that is added to some food to improve its original taste and colour. It is used in foods around the world such as cakes, bread, frozen meats, fish and vegetables. In the beginning, people thought MSG was safe just like salt and sugar. However, in 1968 some people reported they seemed to have bad reactions to MSG after having had a meal at a restaurant. They included headaches and quick heartbeat . It was also reported that MSG excited a person's brain and caused his death in Japan. Scientists think that MSG may lead to many neurological disorders . In mice studies done by a university, the evidence showed the mice didn't want to eat the food including MSG. Today many food companies "hide" MSG on food labels by using different names. If you see "natural flavorings", "hydrolyzed protein" and "spices" in a food label, you are probably seeing a hidden way to "report" MSG in a food label. Every time we have a meal in a restaurant, we always feel the food very delicious to taste, but sometimes it is dangerous for our health because some poisonous food additives have been added to the food. To protect people's health, our governments, from central to local, are taking actions to stop factories producing poisonous food additives. Question: Monosodium Glutamate is _ . - a food - an additive - a factory - a country
an additive
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