Chimpanzees,long considered reluctant to share,apparently can display selfless tendencies,revealing one more key way our closest living relatives are like humans,scientists find. These findings could shed light on the evolution of altruism in humans.

Previously,a belief was widely held that human altruism evolved only after humans split from their ape cousins about 6 million years ago.In recent years,however,research has revealed just how much chimpanzees have in common with us.They can hunt with spears,play with dolls and mourn their partners'death.

“Most of the earlier studies had presented the apes with a complex implement that helped them deliver food to themselves or others,often so complicated that the experiments tested tool skills rather than social tendencies,”De Waal told Live Science.“Ours is the first study that uses no such implement at all.”

In addition to using complex food-delivery systems,past experiments often placed the chimpanzees so far apart that they might not have realized how their actions benefited others.In these new,simplified experiments,two apes were housed next to each other with a screen through which they could see each other.Then,one chimpanzee had to choose between two differently colored tokens (币) from a bin,one of which represented a pro-social (亲社会的) option,the other a selfish option.The pro-social option would cause both chimpanzees to receive a piece of banana wrapped in paper.The selfish option only rewarded the ape who made the choice.

In a study with seven adult female chimps placed into various pairs,the scientists found all the apes showed a definite preference for the pro-social option.“For me,the most important finding is that like us,chimpanzees take into account the needs and wishes of others,”researcher Victoria Horner,said.

The chimpanzees behaved especially altruistically toward partners who either patiently waited or gently reminded them that they were there by drawing attention to themselves.They were less likely to reward partners who pressured through making a fuss,begging persistently or spitting water at them.This is opposite to a long-standing view that the chimpanzees only share food under pressure.

1.The word“ altruism” (paragraph 1) is closest in meaning to ______.

A. selfishness

B. selflessness

C. willingness

D. reluctance

2.Recent researches are performed with less complicated implements mainly to ______.

A. show that chimps are only good at using implements

B. see whether chimps are willing to share food with others

C. find out if chimps are likely to reward partners

D. test chimps’ social tendencies instead of tool skills

3.Which of the following might be the best title of the passage?

A. Evolution History of Altruism in Humans

B. Similarities between Chimps and Mankind

C. Chimps Do Show Selfless Behavior

D. Chimps Only Share Food under Pressure

Shopping for clothes is not the same experience for a man as it is for a woman.A man goes shopping because he needs something.All men simply walk into a shop and ask the assistant for what they want.If the shop has it in stock,the salesman immediately finds it,and the business of trying it on follows at once.All being well,the deal can be and often is completed inless than five minutes.

For a man,small problems may begin when the shop doesn't have what he wants.In that case,thesalesman,tries to sell the customer something else.“I know this jacket is not the style you want,sir,but would you like to try it for size? It happens to be thecolour you mentioned.”Few men have patience with this treatment,and the usual response is: “This is the right colour and may be the right size,but I should be wasting my time and yours by trying it on.”

However,a woman in almost every respect she does so in the opposite way.Her shopping is not often based on needand she is only “having a look around”.She is always open to persuasion; indeed she sets great store by what the saleswoman tells her.She will try on any number ofthings.Most women have an excellent sense of value when they buy clothes.They are always on the lookout for the unexpected bargain.Faced with a roomful of dresses,a woman may easily spend an hour going from one room to another,often retracing her steps,before selecting the dresses she wants to try on.It is a laborious process,but apparently an enjoyable one.Most dress shops provide chairs for the waiting husbands.

1.The underlined part “sets great store by ” in paragraph 3 means___

A. has much information about

B. knows nothing bout

C. believes in

D. has her doubts about

2.What does the passage tell us about women shoppers for clothes?

A. They welcome suggestions from others.

B. They rarely consider buying cheap clothes.

C. They predict what they want to buy.

D. They listen to advice but never take it.

3.What can we learn from the passage?

A. Men never buy what they don't need

B. A man's shopping is often based on need

C. A woman goes shopping in order to look for cheap things

D. A woman's shopping is never based on need.

My friend had mentioned the other day that her father had a lot of children's toys he was looking to give away.She knew I have a three-year-old daughter so she thought of me first.I told her I would love it if I could get some nice things for my daughter,which I wouldn't otherwise have been able to afford.

When I met her father,he began to explain he was too poor once and that he would hate to throw away things that can be very useful.

Before he showed me what he was giving away,I thought the toys would be mostly lego's(乐高积木) or things like that.When he was showing me around I saw a bed,a slide,a kitchen set and many other things that just blew my mind.He told me to write a list of everything my daughter could use and as my eyes were wide,he told me not to feel guilty.He said I was helping him by getting rid of the stuff.

As I was looking around I did feel guilty,but I tried to remain more grateful than guilty.Every time I tried to thank him for giving me and my daughter all this wonderful stuff he would thank me right back.I wanted to believe that he was just thanking me so that I wouldn't feel so guilty but in reality I believe that he was as grateful as I was that these toys would be put to good use.

In the eyes of charity,it makes sense to feel grateful,but guilt is just as normal.I know that we could have lived without a slide,which is why I do feel guilty,but I am grateful all the same because my daughter really does enjoy all these nice things!

1.Why did the old man want to give away his toys?

A. He wanted to help those poor children.

B. He was wealthy enough to buy new toys.

C. He wanted to make full use of those toys.

D. He needed some space for more useful things.

2.In the writer's opinion,the old man felt grateful because

A. he wanted to make her more guilty

B. he wanted her to take the toys quickly

C. the toys would be put to good use

D. he finally got rid of the stuff

3.What can we know from the passage?

A. The writer took all the toys home.

B. The old man was a kind and thoughtful person

C. The writer wanted to refuse the stuff when she first saw them.

D. The writer's daughter enjoyed the slide most among all the stuff.

4.How did the writer feel when given the stuff?

A. Guilty and honored.

B. Grateful and respected.

C. Honored and respected.

D. Guilty and grateful.

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