题目内容：

    Some scientists believe that one of the most intelligent beings on Earth is in fact the octopus (章鱼).

Octopuses usually live at the bottom of river mouths and seas-areas which are not attractive to researchers. They are not social animals so it can be hard to study their interaction with others. And the octopus’ intelligence is not easy for humans to understand. When we observe some animals such as rats or dogs, we can often understand their behavior. Octopuses，however can seem like aliens (外星人). Scientists need to have a lot of imagination to understand what an octopus is thinking!

In the 1950s, the US Air Force sponsored scientists to study the way octopuses use their brains. They hoped that they could use this knowledge to help them build better computers. However, their brains were so complex that the scientists felt it of no significance to continue with it. Octopuses have a very complex nervous system and recent research suggests that they have some of their intelligence inside each arm, which means that each arm can “think” for itself. It also appears that they have a good memory, perhaps similar to a cat’s.

Perhaps the most striking thing about octopuses is their ability to change their color and body pattern. They do this to camouflage themselves to avoid their enemies and also to communicate with others. They can completely change their appearance in less than a second. It can change its skin to look like rocks, sand or planktron (浮游生物).

Some scientists have even suggested that these different patterns and colors are in fact a very hard language-and that each design is a different verb，adjective or noun. But nobody has been able to work out what they might be saying. There’s a long way to go to get to know the octopus completely.

1.What can we infer about the octopus’ intelligence from Paragraph 2?

A.It does not attract scientists. B.Little has been known about it.

C.It is equal to the cat’s or dog’s. D.Much has been done about it.

2.What can we say about scientists’ study on the octopus in the 1950s?

A.They had to give it up eventually. B.They used computers to help.

C.They found its arms could think. D.They judged it lived like a cat.

3.What does the underlined word “camouflage” in Paragraph 4 probably mean?

A.Relax. B.Strengthen. C.Hide. D.Express.

4.What does the author think of the octopuses?

A.They are the smartest animals. B.They’re easy to be seen in the sea.

C.It is useful to copy their language. D.It is difficult to understand them.