공통영어1 YBM 박준언 2과 본문 빈칸 테스트

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

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

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

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

This animal ____ called an octopus.

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

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

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

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

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

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

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

The best evidence ____ their ability to camouflage themselves.

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

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

Even chameleons can utilize only a ____ of fixed patterns.

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

When an octopus ____ its hunter 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 surrounding animals and ____ it to survive.

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

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

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

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

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

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

A few octopuses were found to ____ coconut shells.

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

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

This ____ the octopuses more exposed to predators.

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

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

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

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

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

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

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

Our knowledge about the octopus is still ____ limited.

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

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

Of course, it is impossible for us to know exactly what they feel, but a few ____ 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, ____ it is white when it is relaxed.

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

The octopus seems to be worried that it may not solve ____ problem.

Few scientists today deny that octopuses are intelligent ____

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

There is still so much we do ____ know about the octopus.

Aren’t you curious about what is inside their ____