Question

Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably sing 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 are welcome. Your house is 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 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. 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.
【小題1】Some scientists believe that most of the time bird’s singing is actually ________.

A．a(chǎn)n expression of happiness	B． a way of warning
C．a(chǎn)n expression of anger	D． a way of greeting

【小題2】What is a bird’s “territory”?

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

B．A place where a bird may shout at the top of its voice.

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

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

【小題3】Why do birds keep on singing at nesting season?

A．Because they want to invite more friends.

B．Because their singing helps frighten outsiders away.

C．Because they want to find outsiders around.

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

【小題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 life.

D．By telling a bird’s story.

【小題5】What does the underline word “screaming” in paragraph 4 mean?

A．哭喊聲

B．令人驚愕的

C．尖叫聲

D．尖叫的

Answer 1

【小題1】B
【小題2】D
【小題3】B
【小題4】A
【小題5】C

解析試題分析：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。
【小題1】細(xì)節(jié)題。從Their singing is actually a warning to other birds to stay out of their territory.可知，絕大多數(shù)時間鳥兒唱歌是為了警告同伴遠(yuǎn)離危險，故選B
【小題2】細(xì)節(jié)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(rèn)為是自己的領(lǐng)地的地方，故選D
【小題3】細(xì)節(jié)推斷題。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，故選B
【小題4】細(xì)節(jié)題。文章很多地方都拿人與鳥兒進(jìn)行比較，如If so, you have actually frightened the stranger away without having to fight him.可知選A
【小題5】推斷題。上文講到鳥兒這種叫聲是為了嚇退入侵者，故應(yīng)該是尖叫聲的意思，故選C
考點：科普類說明文
點評：科普環(huán)保類說明文的作答往往圍繞所敘述的一種物質(zhì)來展開全文，對于此類文短題多的文章必須對每句話的內(nèi)容進(jìn)行仔細(xì)的理解，細(xì)節(jié)題的考察占到了大部分的比例，所以學(xué)生需要結(jié)合題目中的關(guān)鍵字迅速定位來找到正確的答案。