중2 동아 윤정미 4과 본문 변형

____ once thought that only humans can use tools.

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

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

They may come to you and ____ out your hair.

They use human hair to floss ____ teeth.

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

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

This ____ the baby monkeys learn to floss.

____ don’t usually think that octopuses are smart.

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

____ use coconut shells for protection.

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

Some octopuses ____ store coconut shells for later use.

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

How ____

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

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

Scientists ____ were studying crows did an experiment.

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

A worm was floating on top ____ the water.

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

The ____ solved the problem just as in the fable.

____ dropped stones into the jar.

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

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