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Match the underlined words with words a–e which have similar meaning. Drag and drop the following five words into their corresponding brackets.
1) But now some scientists believe that one of the most intelligent beings on Earth is in fact the octopus – which doesn’t belong to any of these groups.(1)
2) Firstly, octopuses usually live at the bottom of river mouths and seas – areas which are not attractive to researchers.(2)
3)Secondly, they are not social animals so it can be difficult to study their interaction with others.(3)
4)However, their brains were so complex that the scientists quickly gave up. And even today the octopus brain is a mystery.(4)
5)Perhaps the most striking thing about octopuses is their ability to change their colour and body pattern.(5) __5__(完形填空)
.creatures
.scientists
.observe
.sophisticated
.design

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出自：2024年国家开放大学答案

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