1. (2022高二上·泸县月考) 阅读下列短文，从每题所给的 A、B、C 和 D 四个选项中，选出最佳选项。

As people get older, the types and numbers of friends they have tend to change. As young adults, humans have large groups of friends. With age, they often prefer to spend their time with just a few close, positive individuals. Researchers long believed that this aging attraction toward meaningful relationships was unique to humans, but a new study finds that chimps (大猩猩) also have similar tendencies.

Rosati and her colleagues used 78,000 hours of observations made over 20 years from the Kibale Chimpanzee Project in Uganda. The data looked at the social interactions of 21 male chimps between 15 and 58 years old. The researchers only studied male chimps because they show stronger social bonds and have more social interactions than female chimps.

Researchers found that wild chimpanzees share a similar pattern of social aging with humans. Rosati says, "They prefer strong, mutual social bonds and interact with others in more positive ways as they get older." The older chimpanzees preferred spending more time with chimps that they had become friends with over the years. They would sit close to these long-time companions and groom (梳毛) each other. By contrast, younger chimps had more one-sided relationships where they would groom a friend, but the action wasn't returned.

Older male chimps were also more likely to spend more time alone. The researchers said that they showed a shift from negative interactions to more positive ones, preferring to spend their later years in non-confrontational ( 非对抗性的), positive relationships. Researchers call the preference a "positivity bias".

Researchers theorize that chimps, like humans, are able to change their social focus as they age. "We propose that this aging pattern may be the result of shared changes in our abilities to regulate our emotions with age," Rosati says." This shared pattern between chimpanzees and humans could represent an adaptive response where older adults focus on important social relationships that provide benefits and avoid interactions that have negative consequences as they lose competitive fighting ability."

1. （1） What does the new study find about chimps?

   A . Male chimps show more interactions than females. B . Old chimps don't care about friends as much as young ones. C . Chimps concentrate more on meaningful relations with age. D . Chimps share aging problems similar to human beings.
3. （2） How did Rosati and her colleagues conduct their research?

   A . By studying the data provided by other researchers. B . By making scientific investigations and observations. C . By setting up models on the computer in the lab. D . By monitoring both the humans' and chimps' behavior.
5. （3） What do researchers think causes this aging attraction to meaningful relationships?

   A . Inability to regulate emotions. B . Eagerness to build closer relationships. C . Loss of competitiveness in strength. D . Failure to adapt to the changeable nature.
7. （4） Where does this text probably come from?

   A . A short story collection. B . A popular science magazine. C . A graduate research paper. D . A biology textbook.