Ⅰ.阅读理解
Louis Pasteur was born in Dole, France on December 27,1822.His family was poor, and during his early education Pasteur was an ordinary student who enjoyed art and singing.However, when Pasteur was exposed to science as a teenager, he knew he had found his career.
In 1838，Pasteur went to college to become a science teacher.He then became a chemistry professor at the University of Strasbourg.He got married in 1849 and had five children.However, three died young from typhoid fever(伤寒症)．It was the deaths of his children that drove Pasteur to investigate the infectious disease in order to find a cure.
During Pasteur's time, people believed that bacteria appeared due to “spontaneous generation (自然发生)”．They thought that bacteria just appeared out of nowhere.Pasteur carried out experiments to see if this was true.Through his experiments he proved that germs were living things that came from other living things.They didn't just spontaneously appear.This was a major discovery in the study of biology.Now Pasteur is known as the father of microbiology.
As Pasteur learned more about bacteria, he began to think they may be the cause of diseases in humans.When the French silk market was threatened by a disease to silkworms (蚕), Pasteur decided to investigate.He discovered that this disease was caused by germs.By killing them, he was able to cease the disease and save the French silk business.
Today Louis Pasteur is known as one of the most important scientists in history.His discoveries led to an understanding of bacteria and diseases that has helped to save millions and millions of lives.
本文主要介绍了历史上生物领域的一位伟大科学家。
1．After his children's deaths，Louis Pasteur ________.
A．became afraid of infectious diseases
B．was frustrated and wanted to do nothing
C．decided to find out how to treat the disease
D．didn't know it was typhoid fever that caused their deaths
答案：C
解析：细节理解题。根据文中“It was the deaths of his children that drove Pasteur to investigate the infectious disease in order to find a cure.”可知在他的孩子们死后，Louis Pasteur决定查明如何治疗这种疾病，故选C项。
2．What is implied about Louis Pasteur's discovery in Paragraph 3?
A．It supported what most people thought at that time.
B．It revealed that bacteria often appeared out of nowhere.
C．It attracted the attention of the father of microbiology.
D．It was a very important discovery in the history of biology.
答案：D
解析：细节理解题。根据文中“This was a major discovery in the study of biology.”可知那是生物学历史上非常重要的一项发现，故选D项。
3．What does the underlined word “cease” in Paragraph 4 probably mean?
A．End. B．Find.
C．Develop. D．Spread.
答案：A
解析：词义猜测题。根据“By killing them”及“save the French silk business”可知cease与end意思相近，故选A项。
4．What is the text mainly about?
A．A disease that killed children easily in history.
B．A great scientist in the field of biology in history.
C．Some of the most important scientists in history.
D．Some of the most important discoveries in history.
答案：B
解析：主旨大意题。这篇文章的主旨是介绍历史上一位生物领域的伟大的科学家，故选B项。
