Question 22 is based on the passage you have just heard.

Passage Three

听力原文

    In a recent study carried out by psychologists on the disruptive effects of smartphones, (22) [two groups of college students were given word search puzzles.] The first group was told to complete the puzzles with its participants’ smartphones in their line of sight. The second group, however, was told that the phones would interfere with equipment in the experiment and would need to be moved away from the testing area. Midway through the second groups solving of the puzzles, the experimenter called one of the phones, and let it ring for a while before hanging up. (23) [Many of the students in that group were unable to focus from then on, becoming anxious and performing more poorly than the first group.] 

    Use of electronics has also been known to lead to a decline in human interactions. Rather than having real-life conversations, many express emotions and engage in deep conversations through social media sites. Many students use their phones and computers during class for non-academic activities, which leads to poor grades. (24) [Perhaps the most dramatic impact is the reduction in the amount of sleep, which leads to poor health and weight gain.]

    (25) [Technology is a great tool. However, it’s important to recognize its downsides.] Lack of sleep, reduction of productivity and weight gain are only a few. If we are not careful about all these minor problems right now, the effect on the future generation is going to be much bigger.

22. What were the college students in both groups required to do in the study?

解析：D。录音开头说到，研究人员给两组大学生提供了单词搜索迷宫游戏（word search puzzles），要求他们完成谜题，因此D项正确。

错项排除：A项中的equipment在录音中出现过，但录音说的是研究人员告知第二组学生手机会影响实验设备，而不是让大学生去安装音频设备，故A项错误。B项的eyesight是利用录音中的line of sight设置干扰，但录音中说的是第一组学生的手机要放在他们的视线范围内，并不是说用手机应用测视力，故B项排除。C项的send...messages在录音中没有提到，故排除。