Question

Have you ever wondered why birds sing? Maybe you thought that they were just happy．After all，you probably sing or whistle when you are happy．

Some scientists believe that birds do sing some of the time just because they are happy．However，they sing most of the time for a very different reason．Their singing is actually a warning to other birds to stay out of their territory

Do you know what a“territory”is? A territory is an area that an animal，usually the male，claims(聲稱)as its own．Only he and his family are welcome there．No other families of the same species(物種)are welcome．Your yard and house are your territory where only your family and friends are welcome．If a stranger should enter your territory and threaten you，you might shout．Probably this would be enough to frighten him away．

If so，you have actually scared the stranger away without having to fight him．A bird does the same thing．But he expects an outsider almost any time，especially at nesting(筑巢) season．So he is screaming all the time，whether he can see an outsider or not . This screaming is what we call a bird’s song，and it is usually enough to keep an outsider away．

Birds sing loudest in the spring when they are trying to attract a mate and warn others not to enter the territory of theirs．

You can see that birds have a language all their own．Most of it has something to do with attracting mates and setting up territories．

1.Some scientists believe that most of the time birds’singing is actually ．

A．a way of warning B．an expression of happiness

C．an expression of anger D．a way of greeting

2.What is a bird’s“territory”?

A．A place where families of other species are not accepted．

B．An area which a bird considers to be its own．

C．An area for which birds fight against each other．

D．A place where a bird may shout at the top of its Voice．

3.Why do birds keep on singing at nesting season?

A．Because they want to invite more friends

B．Because they want to find outsiders around．

C．Because their singing helps frighten outsiders away．

D．Because their singing helps get rid of their fears．

4.How does the writer explain birds’ singing?

A．By comparing birds with human beings．

B．By reporting experiment results．

C．By describing birds’ daily fife．

D．By telling a bird's story．

 

Answer 1

1.A

2.B

3.C

4.A

【解析】

試題分析：文章大意：文章講述了鳥兒的叫聲并非全都是在唱歌，而是一種發(fā)出的警告，警示同伴或是嚇退入侵者。

1.細節(jié)理解題。根據(jù)文章第二段最后一句Their singing is actually a warning to other birds to stay out of their territory可知很多的鳥兒唱歌是警告別的鳥兒。故A正確。

2.2】B詞義推測題。從A territory is an area that an animal, usually the male, claims (聲稱) as its own.可知territory是指鳥兒認為是自己的領地的地方。故B正確。

3.細節(jié)理解題。從you have actually frightened the stranger away without having to fight him. A bird does the same thing. But he expects an outsider almost any time, especially at nesting (筑巢) season.可知它在筑巢期叫的原因是幫助嚇退入侵者。故C正確。

4.推理判斷題。文章很多地方都拿人與鳥兒進行比較，如If so, you have actually frightened the stranger away without having to fight him.。故A正確。

考點：考查科普類說明文