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The author pointed out all the following facts EXCEPT that
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After a night's sound sleep, the clerk seems to be ______ enough to finish the heavy task
听力原文： The US military is to throw more ships, planes and personnel into the effort to stem the flow of cocaine and marijuana northward from Latin America. Defense Department officials are expected to announce Friday a plan to detect drug smugglers which includes surveillance by US warships and radar planes in the Caribbean and the use of reconnaissance satellites. Also expected as part of the effort is the expanded use of military personnel to help law enforcement agencies search cargoes at US ports and to increase training of counter-narcotics personnel from Latin American countries. The plan is not expected to include the stationing of warships off the Columbia coast, a controversial proposal rejected by Columbia in January.
According to the news, what are Defense Department officials expected to do on Friday？
听力原文： To most of us sharks are the most dangerous fish in the sea and they attack humans. However, according to Doctor Clark, who has studied the behavior. of sharks for twelve years, humans are not normally on the shark's menu. What do sharks feed on, mainly fish and other sea animals？ Doctor Clark also found that sharks don't eat as much food as people think. For instance, a nine-year-old al-ark only needs two pound of food a day to keep healthy. But she says, sharks sometimes starve and at other times they fill themselves with what they have killed. Around the world, there are only about one hundred shark attacks on humans each year, ten of which proved fatal. But consider this, in the US alone, about three million people are bitten by dogs each year. Of these, thirty people die. If sharks bite you, says Doctor Clark, the reason is usually because of the mistake you have natural food. For example, say you went underwater-fishing and saw a shark, yon could be in trouble. The shark might go for the injured fish you had attacked and take a bite of you at the same time. If you go into a shark's territory and threaten it, it might try to bite you. That's because sharks are territorial and tend to guard their territory. Like dogs, they protect the area they think is their own.
What does the passage say about the eating behavior. of sharks？
听力原文： If the earth gets hotter, what will happen to animals and plants which animals depend on for survival？ The question offers another way of looking at the "Greenhouse Effect". People have talked about the general problem of "Global Warming" for some time. But they were usually worried about things like whether to buy a home on the coast. Biologists and other scientists turn their attention to plants and animals last October. They review evidence that plants and animals are sensitive to climate. Since the Ice Age ended and warmer temperatures returned to the northern latitudes, many species have migrated north. If the predictions about the Greenhouse are correct, temperatures will rise by the same a-mount in the next one hundred years as they did in the past ten thousand. Will animals and plants be able to adapt that quickly to change in the environment？ Many won't. Certain species will become rare. Experts say plants under climate stress will be very open to disease and fire. Forest fires may become more common. That, in turn, may harm animals that depend on the trees for food or shelter. Any preserves we set up to protect endangered species may become use-less, as the species are forced to migrate along with their natural homes. Change is a part of life, but rapid change is the enemy of life.
What is the concern of ordinary people about the "Greenhouse Effect"？
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