B (2026·江苏常州·期中)
Do you have good friends? Do you sometimes feel so close to them that they are like family to you?
It turns out that this isn't just an expression. A study by Yale University has found that you and your friends have more genes (基因) in common than strangers do. Researchers looked at the genes of 1, 932 people and compared them in pairs of unrelated friends and strangers. They found that friends have $1\%$ of genes that match.
“$1\%$ of genes may not sound like much to the layperson (外行), but to geneticists (遗传学家) it is a larger number,” Professor Nicholas Christakis of Yale University told Discovery News. 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 do you happen to become friends with people who
share your genes? Not at all. In fact, it is evolution (进化) that brings you together. “People who share certain genes also share skills and have common likes and dislikes,” researchers said. In the old days, it was important that people who were alike stayed together. For example, people who were easily influenced by the cold were more likely to help each other build a fire, giving them a better chance to stay alive.
Researchers also found that among all the genes studied, those producing a change in 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 the same environments. For example, people who like the smell of coffee may hang out at cafes (咖啡馆) more often and as a result are more likely to meet and become friends with each other.
With their findings, the team has developed an interesting test called the “friendship score”. It can help tell 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 and know in advance (提前) who your friends are going to be, or would you still prefer to learn about it by yourself and let time be the judge?
(
A. look like our cousins
B. share $1\%$ of genes with us
C. feel close to our family
D. can help us when we feel cold
(
A. study how people dealt with the cold in the old days
B. predict that the same environments lead to friendship
C. show that it is evolution that brings friends together
D. explain why people gave each other a chance to keep alive
(
A. kind
B. similar
C. smart
D. different
(
A. Yale University's new study on human genes
B. How evolution helps people make friends
C. The similarities between friends and family members
D. Why friends can be like family: the genetic connection
Do you have good friends? Do you sometimes feel so close to them that they are like family to you?
It turns out that this isn't just an expression. A study by Yale University has found that you and your friends have more genes (基因) in common than strangers do. Researchers looked at the genes of 1, 932 people and compared them in pairs of unrelated friends and strangers. They found that friends have $1\%$ of genes that match.
“$1\%$ of genes may not sound like much to the layperson (外行), but to geneticists (遗传学家) it is a larger number,” Professor Nicholas Christakis of Yale University told Discovery News. 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 do you happen to become friends with people who
share your genes? Not at all. In fact, it is evolution (进化) that brings you together. “People who share certain genes also share skills and have common likes and dislikes,” researchers said. In the old days, it was important that people who were alike stayed together. For example, people who were easily influenced by the cold were more likely to help each other build a fire, giving them a better chance to stay alive.
Researchers also found that among all the genes studied, those producing a change in 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 the same environments. For example, people who like the smell of coffee may hang out at cafes (咖啡馆) more often and as a result are more likely to meet and become friends with each other.
With their findings, the team has developed an interesting test called the “friendship score”. It can help tell 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 and know in advance (提前) who your friends are going to be, or would you still prefer to learn about it by yourself and let time be the judge?
(
B
)4. From the passage, we know that friends .A. look like our cousins
B. share $1\%$ of genes with us
C. feel close to our family
D. can help us when we feel cold
(
C
)5. The writer takes the example of people in the old days in Paragraph 4 to .A. study how people dealt with the cold in the old days
B. predict that the same environments lead to friendship
C. show that it is evolution that brings friends together
D. explain why people gave each other a chance to keep alive
(
B
)6. The underlined word “alike” in Paragraph 4 probably means “”.A. kind
B. similar
C. smart
D. different
(
D
)7. Which of the following would be the best title for the passage?A. Yale University's new study on human genes
B. How evolution helps people make friends
C. The similarities between friends and family members
D. Why friends can be like family: the genetic connection
答案：4.B 【点拨】根据“They found that friends have 1% of genes that match. ”可知，朋友之间有1%的基因是相匹配的。故选B。
5.C 【点拨】根据“In fact, it is evolution(进化) that brings you together. ”和“For example, people who were easily influenced by the cold were more likely to help each other build a fire, giving them a better chance to stay alive. ”可知，作者举古人的例子是为了证明：进化把朋友聚集在了一起。故选C。
6.B 【点拨】根据“People who share certain genes also share skills and have common likes and dislikes”和“it was important that people who were alike stayed together”可知，共享特定基因的人有共同的喜好和技能，此处“people who were alike”指代这类“相似的人”。故选B。
7.D 【点拨】根据文章内容可知，文章主要探讨了友谊与基因之间的关系，以及这种关系如何影响我们的社交行为和友谊的形成。故选D。
5.C 【点拨】根据“In fact, it is evolution(进化) that brings you together. ”和“For example, people who were easily influenced by the cold were more likely to help each other build a fire, giving them a better chance to stay alive. ”可知，作者举古人的例子是为了证明：进化把朋友聚集在了一起。故选C。
6.B 【点拨】根据“People who share certain genes also share skills and have common likes and dislikes”和“it was important that people who were alike stayed together”可知，共享特定基因的人有共同的喜好和技能，此处“people who were alike”指代这类“相似的人”。故选B。
7.D 【点拨】根据文章内容可知，文章主要探讨了友谊与基因之间的关系，以及这种关系如何影响我们的社交行为和友谊的形成。故选D。