Question 20 is based on the passage you have just heard.

听力原文

        Despite smartphones and social media, young people today are as socially competent as those from the previous generation. At least, this is what a new study suggests. For the study, researchers compared teacher and parent evaluations of American children who started kindergarten in 1998 with those who began school in 2010. The former group entered kindergarten when mobile phones were luxuries. The latter group started school when mobile devices were widespread. (19) [Results showed both groups of children were rated similarly on important social skills.] These included the ability to form and maintain friendships and get along with people who are different. They were also rated similarly on self-control, such as the ability to regulate their temper. In virtually every comparison made, ratings of social skills either remain constant or improved for the children born later. There was one exception: (20) [social skills were slightly lower for children who accessed online games and social networking sites many times a day.] (21) [Adults are worried when technological change starts to undermine traditional relationships, particularly the parent-child relationship.] The introduction of telephones, automobiles and radio all led to moral panic among adults of the time, because the technology allow children to enjoy more freedom. Fears over screen-based technology represent the most recent panic in response to technological change. But overall, the study found little evidence that time spent on screens was hurting social skills for most children.

20. What did the study find about children who access social networking sites many times a day?（关于那些每天多次登录社交网站的儿童，该研究发现了什么？）

解析：A。录音中提到，那些每天多次打网络游戏或登录社交网站的儿童，其社交能力稍微偏低。由此可知，多次登录社交网站的儿童在社交技能方面受到了负面影响，A项符合题意，故为正确答案。

错项排除：B项利用录音中的were slightly lower进行干扰，但录音中说的是社交能力稍微偏低，而不是学习成绩，故B项错误。录音中提到，两个群体在自控能力上的评分也很接近，比如调节情绪的能力，故C项错误。录音中没有提到两个人群与同龄人的关系是否紧张，故排除D项。