单项选择题

According to the research findings mentioned in the passage, reptiles ______.

A．such as turtles and snakes cannot close their eyes
B．cannot be studied with an EEC
C．do not sleep in the tree sense of the word
D．do not need to rest
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单项选择题
According to the author, all animals ______.
A．spend some time resting
B．close their eyes when sleeping
C．are good sleepers
D．are poor sleepers
单项选择题
Animals that are good sleepers ______.
A．need to have a good sleep after they have exhausted themselves by getting rid of hunting animals
B．need to have a good sleep after they get tired from hunting other animals
C．are all mammals
D．almost always have a safe resting place
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