중2 동아 윤정미 4과 본문 변형

People once thought that only ____ can use tools.

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

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

They may come to you and pull ____ your hair.

They use ____ hair to floss their teeth.

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

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

This way, the baby monkeys learn to ____.

People ____ usually think that octopuses are smart.

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

They use coconut ____ for protection.

When they ____ find a good hiding place, they hide under coconut shells.

____ octopuses even store coconut shells for later use.

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

How ____!

In Aesop’s fable The Thirsty ____, a crow drops stones 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 ____ in front of a crow.

A worm was ____ on top of the water.

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

The ____ solved the problem just as in the fable.

It ____ stones into the jar.

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

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