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II. 綜合測驗:20%-3
Sleep is a very important part of many creatures' lives. To get enough rest and stay healthy, humans
go to bed every night and spend several hours sleeping. Some animals, 11., have very unusual
sleeping habits compared with those of humans.
Most giraffes, 12.___, spend just half an hour a day in dreamland! This enables them to watch out
for dangerous predators almost around the clock (and not) 13. by any of them. It might be hard for us
S.
to imagine(_ 14. such large creatures manage to live with so little rest) but that is what they must do in
order to survive. 16
Another thing that humans might find surprising is that dolphins are able to "_15._____ off" half of
their brain while sleeping. That is, when one half of their brain is asleep, 16. half stays awake. This
enables them to stay safe and to regularly return to the 17. of the ocean for air. Since they can only
hold their breath for around twenty minutes, this ability allows them to get sufficient rest and is key to
their survival. By remaining half awake at all times, dolphins can
18.
easily without drowning.
Another unbelievable sleeping habit of animals is taking naps in the air.
19.
studies, birds like
龍騰文化 肯定自己,肯定不同
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