Question

    You sometimes feel so close to your friends that they are like family to you. Why? A study by San Diego, a professor, has found you and your friends have more genes (基因) in common than strangers do. Maybe this gives you the answer.

Researchers looked at the genes of 1,932 people and compared them in pairs of friends and strangers. They found that friends have 1 percent of genes that match.

“One percent may not sound like much to laypersons (外行),but to geneticists (遗传学家) it is a huge number,” Professor Nicholas said. “In fact, this is the same amount of genes you share with your fourth cousins, those who have the same great-great-great grandparents as you.'

So is it a coincidence (巧合) that you become friends with people who share your genes? Not at all. “People who share certain genes also share skills and have similar likes and dislikes,” researchers said. In ancient times, it was important that people who were alike stayed together. For example, people who had a similar sensitivity to the cold were more likely to help each other. They would make a fire to, give themselves a better chance to live. Researchers also found that among all the genes studied, those influencing the sense of smell were the most similar in friends. This is probably because people who smell things in the same way are more easily drawn to similar environments.

Based on the findings, the team has developed an interesting test called the “friendship score”. It can calculate how big the chances are that two people will be friends by studying their genes.

So, here is a question for you: would you like to take this test to know who your friends are going to be?

1.You sometimes feel close to your friends because_________.

A.they act like your family B.you spend much time together

C.you influence each other a lot D.you have more genes in common

2.What can we know according to Professor Nicholas's words?

A.Our friends are actually relatives of ours.

B.One percent sounds like much to laypersons.

C.We have one percent of genes that match our fourth cousins.

D.Our fourth cousins have the same great-great grandparents as us.

3.What kind of genes are the most similar in friends?

A.The genes that make people have similarities in the look.

B.The genes that make people smell things in the same way.

C.The genes that make people have a similar sensitivity to the cold.

D.The genes that make people develop a similar taste in music.

4.What does the underlined word “calculate” in the text mean?

A.work out B.depend on C.set up D.make sure

5.What is the best title of the text?

A.Our Friends, Our Family B.Good Friends, the Same Genes

C.Genes Help Us Become Friends D.“Friendship Score”, an Interesting Test

Answer

1.D

2.C

3.B

4.A

5.C

【解析】

研究表明朋友之间拥有一定数量的相同基因。本文针对这—结论进行了闸述。

1.细节理解题。结合第一段中的“...you and your friends have more genes (基因) in common than strangers do. Maybe this gives you the answer.”可知，你有时感觉和自已的朋友很亲近是因为你和你的朋友拥有比陌生人多的相同基因。故选D。

2.细节理解题。结合第三段“In fact, this is the same amount of genes you share with your fourth cousins, those who have the same great-great-great grandparents as you.”可知，我们和我们的第四代表亲拥有1%的相同基因。故选C。

3.细节理解题。结合第四段中的“Researchers also found that among all the genes studied, those influencing the sense of smell were the most similar in friends.”可知，在朋友之间，影响嗅觉的基因最为相似。故选B。

4.词义猜测题。根据倒数第二段“It can calculate how big the chances are that two people will be friends by studying their genes.”此处是说，它可以通过研究两个人的基因来计算出他们成为朋友的可能性有多大。故calculate意为“计算，算出”，与A项同义。故选A。

5.标题归纳题。本文主要介绍了基因对交朋友的影响。C项最适合作本文的标题。故选C。