중2 동아 윤정미 4과 본문 변형

People once thought that only humans can use ____.

Now, scientists are ____ out that many animals can also use tools.

If you go to a Buddhist temple in ____ Buri, Thailand, watch out for the Macaque monkeys.

They may come to ____ and pull out your hair.

They ____ human hair to floss their teeth.

If you are lucky, you may see female monkeys that are teaching ____ to their babies.

While the babies are watching, the female ____ floss their teeth very slowly.

This way, the baby monkeys ____ to floss.

People don’t usually think that ____ are smart.

However, octopuses are very smart, and they can also ____ tools.

They use coconut shells for ____.

When they can’t find a good ____ place, they hide under coconut shells.

____ octopuses even store coconut shells for later use.

They pile the coconut ____ and carry them to use later.

____ smart!

In Aesop’s fable The Thirsty Crow, a crow drops ____ into a jar to raise the level of water.

____ may think this is just a story, but it is not.

Scientists who were studying crows did an ____.

They put a jar with water in ____ of a crow.

A worm was ____ on top of the water.

____, the water level was low, so the crow could not eat the worm.

The crow ____ the problem just as in the fable.

It dropped stones ____ the jar.

If you think this bird is special, ____ are wrong.

Scientists did the same experiment with other crows, and they all did the same, ____.