[解析]
(1)B.词义猜测题。根据上文The coronavirus has affected everyone's life,especially for students.Schools closed and graduation ceremonies were canceled.Summer plans,like camps and internships(实习)are up in the air.新冠病毒影响了每个人的生活,尤其是学生。学校停学了,毕业典礼取消了。因此可推知暑期计划如夏令营和实习也不确定了, "up in the air"意为计划不能继续,A.unnatural不自然的;B.uncertain不确定的;C.unnecessary没有必要的;D.unreasonable不合理的。故选B.
(2)A.推理判断题。由第四段的第一句"The coronavirus has disrupted everyone's lives,but for students,the disruption(中断) feels particularly acute.新冠病毒已经扰乱了每个人的生活,但对学生来说,这种干扰感觉尤为严重。"可知介绍Andrew Chen的故事意在展示冠状病毒如何影响学生的生活。故选A.
(3)D.推理判断题。由第七段的" I thought that there had to be a way to reach younger folks,who were probably not watching the news.我认为必须有办法联系到可能没有看新闻的年轻人。"可知他主要是想给不知道情况的年轻人一点提示,故选D.
(4)B.目的意图题。根据第二段" Harycki knows that his peers are worried they can't connect with their friends in the same way,so he created the social distancing pledge to stress that while everyone might be physically distant,they're still connected.Harycki 知道他的同伴担心,他们不能以同样的方式与朋友联系,所以他创建了社会距离誓言,强调虽然每个人可能身体上都很遥远,但他们仍然是联系在一起的。"可知Harycki创建"社交距离承诺"的目的是说服年轻人呆在家里。故选B.