1. 答案：B
解析：
根据听力原文中Biochemistry is a very specific area of chemical science. First of all, the purpose of biochemistry is to find out which chemicals in particular and, how interact with particular systems inside the human body and how they affect its functions.可知，生物化学研究的是人体的某一系统和他们如何运转， interact with与interaction为同义替换，所以，答案为B。
2. 答案：A
解析：
根据听力原文中Therefore biochemistry right now is very rapidly developing area because there is a high demand, for efficient and quickly, acting chemicals and quickly acting drugs.可知，生物化学之所以是一个快速变化的领域，是因为人们对高效、快速见效的药物需求，所以，答案是A。
3. 答案：D
解析：
根据听力原文中And one area of biochemistry which is of a particular interest is computer based analysis of chemical components, and computer based design of drug, agents.可知， 文中能听到的是生物化学特别有意思的一个领域是基于电脑技术的药物开发，所以，答案为D。
