【正确答案】
D
【答案解析】[听力原文] Most people have recognized the benefits of learning a foreign language: You can travel to foreign countries and feel comfortable, be a more productive employee in today's competitive job market, and immerse yourself in the vast cultures that surround you. Scientific studies have even shown that learning a new language helps to keep memories sharp and naturally enhances overall brain function. But did you know that you can learn a new language in as little as 10 days? The Pimsleur Approach to learning new languages helps users pick up new languages quickly. Even the FBI has purchased the Pimsleur Approach. Your brain is already wired to start speaking a language in 10 days. You just need to activate it. Dr. Pimsleur, a Ph.D. and specialist in the field of applied linguistics, devoted his life and career to learning languages and understanding the psychology of language acquisition. Dr. Pimsleur was a language educator for more than 20 years. He noticed that children have an amazing ability to learn new languages quickly. He recognized through extensive researches that effective communication in any language depends on mastery of a relatively limited number of words. And, trying to learn too many words at first can actually slow the language learning process. However, once this 'core vocabulary' is mastered and used consistently, it provides a framework for accelerated language learning. The Pimsleur Approach aims to teach you to use the core vocabulary of the language, so you can speak the most in the least amount of time. What counts is not how many words you know, but rather, how many words you can use. Which one is the benefit of learning a new language? 短文在开头列出了几点学习语言的好处，其中就包括keep memories sharp and naturally enhances overall brain function，由此可知，学习语言可以增强大脑功能。因此答案为选项D。选项C与原文不符，选项A和B属于过度推断。
【正确答案】
B
【答案解析】[听力原文] What, according to Dr. Pimsleur, is the key factor to start speaking a new language in 10 days? 短文中Pimsleur博士提到The Pimsleur Approach aims each lesson at teaching you to use the core vocabulary of the language, so you can speak the most in the least amount of time. 由此可知，学习核心词汇可以让人在最短的时间内开始应用一门外语。因此答案为选项B。