閱讀理解

We are used to the idea of aging in ourselves．We are so used to this that it comes as a surprise to find that there may be some animals that do not age．Sea anemones(�？�)are an example．Some have been kept for nearly a century without showing any signs of lifelessness．Some kinds of sea worms can even “grow backwards”．If kept in the dark and given nothing to eat, they get steadily smaller．They finally end as a ball of cells looking rather like the egg from which they came．Under good conditions the ball will turn back to a worm and start growing again．One could probably keep them growing and ungrowing again and again．

(1)

Some sea worms grow smaller when they ________．

[　　]

A．

lose weight

B．

live in the darkness

C．

are under good conditions

D．

don’t eat and are kept in the dark

(2)

According to the passage, some sea animals ________．

[　　]

A．

will die when they become a ball of cells

B．

do not grow old

C．

will die without food

D．

will stop growing any time they want

(3)

The underlined word“aging”in the first sentence probably means ________．

[　　]

A．

growing old

B．

the age of a person

C．

getting younger

D．

ungrowing

(4)

This passage is mainly about ________．

[　　]

A．

sea animals

B．

cells

C．

aging

D．

anemones

答案：1．D;2．B;3．A;4．C;
解析：

(1)

根據(jù)文章第六句話“If kept in the dark and given nothing to eat, they get steadily smaller．”可知，置于暗處并斷絕食物，它們會(huì)變小。

(2)

根據(jù)文章第二句話往后可知，海葵等有些海洋生物不會(huì)變老。

(3)

通過(guò)整篇文章理解，aging是指“變老；衰老”。

(4)

本文主要講述“變老；衰老”這一現(xiàn)象，既涉及到了人類(lèi)，又涉及到了海洋生物。


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