When it comes to rabbits, we always think of their long ears. But do you know 1.
why
they have such long ears?
With their long ears, rabbits can pick up sounds from up to 2.
rabbits
can move their ears in two different directions. Each ear can turn up to 270 degrees. This helps them 3.
(to) hear
(hear) the sounds from all directions, 4.
for
example, when they hear the sounds of a wolf coming, the rabbits can quickly run away.
Another reason why rabbits have long ears 5.
is
(be) for controlling their body temperature. Rabbits have 6.
many
(much) blood vessels (血管) in their long ears. When a rabbit feels hot, the blood vessels will 7.
become
(become) greater in size. This allows more blood to move to its ears. As air blows over, it 8.
makes
(make) the blood cool down. Then the cool blood moves to other parts of the body so that it feels 9.
comfortable
(comfort). However, less blood moves to the rabbit's ears 10.
on
cold days. This helps to keep the heat.
