Write a multi-choice question for the following article: Article: Around the world coral reefs are facing threats brought by climate change and great changes in sea temperatures. While ocean warming has been the primary focus for scientists and ocean policy managers, cold events can also whiten corals. A new study by scientists compared damaged to corals exposed to heat as well as cold stress. The results show that cool temperatures can cause more damage in the short term, but heat is more destructive in the long run. Climate change is widely known to produce warming conditions in the oceans, but extreme cold-water events have become more frequent and serious as well. In 2010, for example, coral reefs around the world faced on of the coldest winters and one of the hottest summers on record. During a unique experiment, corals under cold temperatures suffered greater damage in just days compared with heat treated corals. Yet the researchers found that corals were eventually able to adjust to the cold conditions, make their health stable and continue to grow. However, over the long term corals subjected to heat suffered more greatly than those in cold, with evidence of severe whitening and growth stoppage, which leads to death. The coral's ability to adjust to cool temperatures surprised the researchers, who say the study's results show the complexities of monitoring coral health in response to different environmental factors . "Global warming is associated with increases but also decreases of temperatures," said Deheyn, one of the researchers. "Not much has been known about the comparative effects of temperature decrease on corals. These results are important because they show that corals react differently to temperature differences, which is important for future management of coral reefs in the field of climate change."
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Answer: Question: Scientists reached the conclusion through _ .Options:A news reportB scientific studyC great imaginationD natural conditionsAnswer:B

Write a multi-choice question for the following article: Article: To wash yourself, you take a bath or a shower. Animals need to keep clean, too. How do animals clean themselves? Cats themselves to keep their fur clean. Have you ever watched a pet cat clean itself? Elephants take baths much as you do. But instead of jumping into the , they walk into a river or lake. Pigs also like to roll around in water. This keeps them clean and cool. If there is no clean water, they will roll in on a hot day. They do this to cool off. Pigs do not really like mud. They are happier in a nice, clean pond . Bats have a funny way to keep clean. They lick their thumbs to clean their ears! Guess how polar bears clean themselves. They use snow, of course! Some animals take baths in dust instead of water! The wombat is an Australian animal with lots of fur. To get clean, it lies down. Then it covers itself with sand! Birds clean themselves in many ways. Sometimes they wash in water. That's why some people put birdbaths in their yard. At other times birds take dust baths, just like wombats. Birds also use their to keep their feathers clean. They use their beaks the way you use a comb. Sometimes a bird has in its feathers. Birds may use ants to help them clean off the bugs. A bird will lie down on an ant nest. Then the ants will crawl on the bird. The ants make a kind of bug on the feathers;. Then the itchy bugs die! Birds take baths in something else besides dust and ants! Some birds take "smoke baths" They sit on chimneys. They wave their wings in the smoke!
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Answer: Question: Which of the following animals use dust to clean themselves?Options:A Cats.B Bats.C Wombats.D Ants.Answer:C

Write a multi-choice question for the following article: Article: What do you think of British people and American people? You might think that there are no differences between the people in the two countries. After all they speak the same language, don't they? But if you ask a British or an American person, the differences are quite great. What do British people think Americans are like? The British think Americans are very strange. They make a lot of noise and they laugh too loudly. They are rich, and they only think about money. But the British do say that Americans are kind, friendly people. They are happy to help you if you are in trouble. What do Americans think of the British? Well, they think the British are cold and very unfriendly. They are not interested in success or in making lots of money. They think Britain is the best country in the world. They look down upon other countries. But Americans say that the British are quite good workers. They are brave and honest. And in time of trouble they face difficulties happily. You can see that these ideas can cause misunderstanding between the British and Americans. But when American and British people become friends, they usually find things are not as bad as they expected. ,:
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Answer:
Question: The American and British people usually get along quite well _ .Options:A when misunderstanding is caused between themB once they become friendsC after they fightD when they help each otherAnswer:B