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Phytons, bats and giant armadillos are among the longest sleepers at over 18 hours a day. Human babies need 16 hours, and most of us probably feel we need around eight hours sleep to function well.
Professor Jerry Seigel from University of California, Los Angeles, conduct a study of the sleep times of a broad range of animals and found they very widely. Some, like migration birds, can survive long periods without sleeping at all. He believes that shows sleep evolved to conserve energy.
Jerry Seigel: ‘It’s animals that are needlessly active that will not survive, but animals that are most efficient and use their waking time to do vital functions, and are otherwise asleep that will survive.’
Sleep helps make best use of liminted resources. In humans, when we’re awake, our brain accounts of 20% of the energy we use when just sitting around.
Sleeping also makes us less likely to get injured and less likely to be detected by predators.
 
In the text, the underlined words “sleep”, “animals” and “widely” function as:
(X) noun – noun – adverb
() adjective – noun – adverb
() adjective – noun – adjective
() noun – noun – adjective
() noun – adjective - adverb
 
 
The sentence “animals that are needlessly active that will not survive” in the Reported speech would be:
() Jerry said that animals that have been needlessly active that will not survive
() Jerry said that animals that have been needlessly active that would not survive
(X) Jerry said that animals that were needlessly active that will not survive
() Jerry said that animals that were been needlessly active that would not survive
() Jerry said that animals that are being needlessly active that would not survive
 
 
Among the benefits of sleep we may NOT include:
(X) No energy waste
() Lower probability of getting hurt
() Better use of resources
() Convervation of energy
() Lower probability of being caught by a predator
 
 
"But that market has moved to advertising on the internet". Choose the alternative that can be completed with the same underlined verb tense.
() Last January I ______ (move) to Denver.
(X) Since 1980 that store ______ (be) the most famous store in town.
() She _____ (paint) the wall for hours.
() She _____ (travel) when the accident happened.
() They _____ (arrive) when we got there.
 
 
The sentence: "Newspapers are reducing