【答案】DAB
【文章大意】很多人都觉得外语很难学，那么如何学好一门外语呢？在本文中作者提出了几点建议。最重要的是扎扎实实走好每一步，不要有知识的遗漏。再次要把外语的学习应用到日常生活中，学会用外语交流。此外，语音的掌握也非常关键。
【解析】
21主旨大意题。根据首段there are a few tips you can use in order to earn a top grade--as well as actually use the skills you've learned可知本文目的是为了介绍几点学英语的建议，选D。．
22主旨大意题。本段首句Learning a new language is not only an academic tool，but can help you in your everyday life as well提出学习一门新语言不仅可以成为一种学习的工具，而且也能在日常生活中起到帮助作用，然后又进行具体介绍，故选A。
23细节理解题。从文章第四段 And it is important to learn correct pronunciation as soon as possible for poor pronunciation can be hard to break可知掌握发音非常关键，选B。
B
Each of us can live strong，healthy，energetic lives for a long time to come．The key？Actually，there are
