The world we live in is full of amazing things. Do you know the following things?
★Chocolate tastes nice but it may make a little dog die.
★We may sleep for eight hours at a time but a snail (蜗牛) may sleep for three years.
★Our ears and nose become bigger when we grow up but eyes keep the same after a person is born.
★You may think a bear walks slowly. In fact, it can run as fast as a horse.
★Cats won’t die if they fall off very high places because they can turn themselves up the right way.
★The largest animal on the earth is the blue whale (鲸). It weighs about 80 tons (吨)—more than 24 elephants.
★Most animals will die soon if they lose the head. But a cockroach (蟑螂) can live for nine or ten days when they have no head.
★Not all birds can fly. About forty kinds of birds can’t fly, like the penguin (企鹅) and the ostrich (鸵鸟).

Some_______ things in the world
_______	It’s nice but you can’t give it to little _______, because it can kill them.
Snails	They can sleep as long as three _______
Our eyes	The size of the eyes doesn’t ________ from birth.
Bears	They can run very _______ like a horse.
Cats	After _______ off very high places, they can stay alive.
Blue whales	They are the largest animal and a blue whale’s _______ is about 80 tons.
Cockroaches	They can live for nine or ten days _______ the head.
Birds	Most birds are good at flying but some _______

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