공통영어1 YBM 박준언 2과 본문 빈칸 테스트

Here is an animal with poison like a snake, a hard and pointed mouth ____ a bird, and ink like a pen.

It can weigh as much ____ an adult human and stretch as long as a car.

Yet it can put its boneless body through a ____ the size of an orange.

It can change color and shape, and ____ can taste with its skin.

This animal is ____ an octopus.

The ____ looks so alien to the people of the West that it has caused dislike or even horror in them.

The dislike or horror helped create the image of ____ octopus as an evil creature living in the deep sea.

For example, the Kraken, ____ sea monster in old Icelandic tales, looks just like an enormous octopus.

Another ____ is Ursula, the sea witch featured in the famous tale, The Little Mermaid.

To this day, it is difficult for us to imagine that octopuses and humans ____ any meaningful similarities.

During the past few decades, however, scientists have ____ to find more and more similarities between octopuses and humans.

One of the ____ interesting ones is intelligence. Octopuses are smart.

The best evidence is their ability ____ camouflage themselves.

An octopus can change its color, pattern, and texture, and the ____ are carried out almost instantly.

In terms of speed and ____ diversity of change, no other animal can rival octopuses.

Even chameleons can utilize only a ____ of fixed patterns.

____ main purpose of these changes is to avoid detection by their hunters or their prey.

When an octopus encounters its ____ or prey, it must decide very quickly which color, pattern, and texture to choose.

Such a decision implies that it has gained sufficient knowledge of the ____ animals and applies it to survive.

To acquire knowledge and ____ it for a particular purpose is a sure sign of intelligence.

____ sign of the intelligence of the octopus is its use of tools.

____ the lab, octopuses use tools to get food rewards.

____ the wild, they use stones to create walls to protect the entrances to their homes.

They use not only stones but anything they can find to ____ themselves.

The most impressive example of octopuses using ____ came in 2009 in Indonesia.

____ few octopuses were found to collect coconut shells.

They cleaned the shells with bursts of water, carried them to a new location, and piled them as ____ shelter.

Traveling with the shells under their bodies forced ____ to walk slowly along the sea floor.

This made ____ octopuses more exposed to predators.

But it seems that ____ were willing to take that risk for greater future protection.

The scientists who discovered the behavior argue that this is clear evidence ____ octopuses using tools.

Octopuses’ use of tools can be found in their love of toys ____ puzzles, too.

They are curious about new ____ and do not like getting bored.

That is ____ aquariums try to come up with ideas to keep their octopuses busy.

Some aquariums hide food inside a big doll and let ____ octopus break up the toy to get the food.

____ offer plastic building blocks for their octopuses to play with.

Our ____ about the octopus is still very limited.

Thanks to the efforts of scientists, however, ____ is expanding year by year.

One of the most impressive ____ findings about the octopus is that it seems to have feelings.

Of course, it is ____ for us to know exactly what they feel, but a few of their changes in skin color seem to be linked to their feelings.

For example, a giant Pacific octopus that turns red seems to be excited, while it ____ white when it is relaxed.

An octopus presented with ____ difficult puzzle often undergoes several rapid changes in color.

The octopus seems to be worried that it may ____ solve the problem.

Few scientists today deny that ____ are intelligent animals.

Perhaps ____ is time that we stopped thinking of them as alien creatures and acknowledged them as intelligent animals like us.

There ____ still so much we do not know about the octopus.

Aren’t you curious about what is inside ____ mind?