A
Albert Hofmann was born in Baden, Switzerland, on January 11,1906. He was the eldest of four children. His father was a poor toolmaker in a factory and they lived in a rented apartment. He spent much of his childhood outdoors and grew up with a deep connection with nature. He had very exciting experiences in his childhood. During his growth, nature was changed in magical ways that he didn't understand. These experiences caused questions in his mind. He was so fascinated by nature that it led him to a career in which he looked for the answers to these unanswered questions. Chemistry was the scientific field which allowed him to understand them. He studied chemistry at Zurich University，and his main interest was the chemistry of plants and animals. At 23, he earned his PhD with honors.
He worked at Sandoz Laboratories where he developed his research work, and there he made a lot of success by working with various plants and changing them into something useful. He became famous when he became the first person to produce lysergic acid diethylamide (LSD)(迷幻药). In addition，he was also the first person to taste it and learn about its hallucinogenic(引起幻觉的) effects. He was deeply connected to nature and argued that LSD，besides being useful for psychiatry (精神病学), could also be used to promote awareness of mankind's place in nature. However, he was disappointed that his discovery was being carelessly used as a drug for entertainment. Because of his discovery，LSD fans have fondly called him “the Father of LSD”. Besides carrying out his scientific experiments, he also authored numerous books and more than 100 scientific articles. In 2007, he featured in a list of the 100 greatest living geniuses，published by The Telegraph Newspaper.
本文介绍了瑞士科学家Albert Hofmann 的成长经历以及科学成就。
21．Why did Albert Hofmann take chemistry as his career?
A．He wanted to find answers to the questions that puzzled him.
B．He hoped to become a chemical scientist.
C．He was interested in psychiatry as a small child.
D．He wanted to change nature in a magical way.
解析：细节理解题。由第一段中的“He was so fascinated by nature that it led him to a career in which he looked for the answers to these unanswered questions. Chemistry was the scientific field which allowed him to understand them.”可知，化学能回答他感到迷惑的问题。故选A项。
答案：A
22．How did he get wellknown?
A．His father invented great tools.
B．His research was connected with nature.
C．He had very exciting experiences.
D．He produced a chemical called LSD.
解析：细节理解题。从第二段第二句“He became famous when he became the first person to produce lysergic acid diethylamide called (LSD)(迷幻药)．”可知Albert Hofmann 第一个研制出LSD，这让他出名了。故选D。
答案：D
23．What did Albert Hofmann think of his production of LSD?
A．It should not have been produced.
B．It did no good to human beings.
C．It did no harm to human beings.
D．It was a regret to be used to give pleasure.
解析：细节理解题。根据第二段中“However, he was disappointed that his discovery was being carelessly used as a drug for entertainment.”可知，当他知道迷幻药用来当作使人产生快感的毒品时，Albert Hofmann 感到非常失望。故选D项。
答案：D
24．We can infer from the passage that the writer's attitude toward Albert Hofmann is ________.
A．disapproval B．indifferent
C．positive D．disappointed
解析：推理判断题。综合全文可知，Hofmann 是伟大的科学家，为生物化学的研究做出了巨大贡献。在2007年，他被认为是100位依然在世的最伟大的天才之一。所以作者对他做出了肯定积极的评价。
答案：C
