[解析]
(1)D.单词猜测题.根据第一自然段"Studying abroad, to some people, sounds like a dream coming true."可知出国学习对一些人来说是实现梦想,再结合下文"being away from your family in a strange culture can be very scary"可知远离家人,在一个陌生的文化中也是非常恐惧的,因此可猜测"nightmare"是噩梦之意,故选D.
(2)C.推理判断题.根据第一自然段" But if you do decide to study abroad, it is important to know the benefits and downsides."可知如果你决定出国学习,知道益处和弊端是很重要的,因此可推断作者认为出国学习不适合所有的学生,故选C.
(3)B.标题总结题.根据第一自然段" But if you do decide to study abroad, it is important to know the benefits and downsides."可知如果你决定出国学习,知道益处和弊端是很重要的,再结合文章主要内容可知文章的标题是"出国学习的优势和劣势",故选B.