[解析]
(1)C.段落大意题。根据第三段"The basic idea is this:by stopping your activity after the study,your brain gets a chance to rest.Resting is difficult when you are playing computer games."其基本思想是:在学习结束后停止活动,你的大脑就有机会休息。当你玩电脑游戏时,休息就很困难。由此可知,第三段的主要内容是休息的原因。故选C.
(2)C.细节理解题。根据倒数第四段"If you want to give 'wakeful rest' a try,here are a few simple things to do.Rest quietly for five to ten minutes.Do not look at your phone,read stories or play games.It is really that easy!"如果你想尝试一下"清醒式休息",这里有一些简单的事情可以做。安静地休息五到十分钟。不要看你的手机,读故事或玩游戏。真的很简单!由此可知,C选项"坐在那里什么也不做"这一活动在学习后可能会被推荐。故选C.
(3)D.推理判断题。根据倒数第二段"The National Sleep Foundation (NSF) suggests that adults between the ages of 20 and 64 get between 7 and 9 hours of sleep per day.Teenagers may need a little bit more,and people over the age of 65 may need a little less."国家睡眠基金会建议20到64岁的成年人每天要睡7到9个小时。青少年可能需要多一点,65岁以上的人可能需要少一点。结合选项可知,根据国家睡眠基金会的说法,青少年每天应该睡大约9个小时。故选D.
(4)B.标题归纳题。根据第一段"What you do after studying could have a big effect on how well you learn and remember.Today on Education Tips,we will explore two no﹣cost ways that can help you improve your learning:wakeful rest and sleep."学习后做什么对你的学习和记忆有很大的影响。在今天的教育小贴士中,我们将探索两种免费的方法来帮助你提高你的学习:清醒式休息和睡眠。结合文章主要介绍了一种名为"清醒式休息"的休息方式,指在学习后停止活动,让大脑有机会休息,从而能更好地记住所学信息。介绍了这一休息方式的操作方式,除了清醒式休息,睡眠对学习也很重要,介绍了睡眠对人们的影响和各年龄段人合适的睡眠时间。由此可知,选项"B.What to Do After Your Study"最符合文章标题。故选B.