Ashok Gadgil has spent the past three decades helping people in need—and he has no plans to stop .On May 2, Gadgil won the$100．000 Lemelson-MIT Award for Global Innovation. Each year，the honor is given to an inventor who has improved the lives of people in developing countries. Gadgil‘s inventions have helped more than 100 million people around the world.
Gadgil is a professor and physicist at the University of California. When he’s not teaching，he works to find solutions to global problems such as energy efficiency and water safety. “I chose to focus on problems where my knowledge of science could help，”he said
In the 1980s he came up with a program to make energy-efficient light bulbs more affordable for people in developing countries. Then in the 1990s，Gadgil designed his first life—saving invention，UV Waterworks .The device kills deadly disease —carrying germs(病菌)from drinking water. It costs just one cent to clean five liters of water .Gadgil was inspired to find an inexpensive solution to the clean water crisis after more than 10，000 people in his home country of India died from an outbreak of Bengal cholera，in 1993 The disease is spread through contaminated food and drinking water .So far，the invention has provided safe drinking water to more than five million people in poor areas.
As a professor，Gadgil encourages his students to stay positive about finding solutions to hard problems.“Be optimistic when you try a hard problem．”he says. “It’s when you solve a large problem that you can have a big impact on the world”
小题1:Gadgil was given Lemelson-MIT Award for___________.
A．his teaching experience
B．his new physical research
C．his vast knowledge
D．his helpful inventions小题2:What call we learn about UV Waterworks?
A．It's Gadgil’s first invention
B．It’s used to clean water．
C．it was designed for his home country
D．It saved 10，000 people in total小题3:The underlined word “contamninated”in Paragraph 3 means__________.
A．wasted
B．consumed
C．polluted
D．canned小题4:According to the last paragraph，Gadgil encourages his students__________.
A．to learn lessons from failures
B．to find problems in peaceful life
C．to make inventions to help poor people
D．to be confident when facing difficulties小题5:Which of the following can best describe Gadgil?
A．Caring and optimistic.
B．Independent and positive.
C．Powerful and strict.
D．Responsible and sensitive.
小题1:D
小题2:B
小题3:C
小题4:D
小题5:A
题目分析：文章大意：文章主要讲述Ashok Gadgil为改善发展中国家人民的生活而努力，作为教授，他鼓励学生积极面对难题。
小题1:细节理解题。从第一段Each year, the honor is given to an inventor who has improved the lives of people in developing countries. 可知他由于改善了发展中国家人民的生活而被授予奖项。故D正确。
小题2:细节理解题。从第四段The device uses ultraviolet light to kill deadly disease-carrying germs from drinking water. 可知是用来净化水的。故B正确。
小题3:词义推测题。根据此词前后in 1993 The disease is spread through contaminated food and drinking water可以推测出contaminate为“污染的”之意。故C正确。
小题4:细节理解题。根据文章最后一段As a professor，Gadgil encourages his students to stay positive about finding solutions to hard problems可知他鼓励学生积极面对难题。故D正确。
小题5:推理判断题。文章主要讲述Ashok Gadgil为改善发展中国家人民的生活而努力，作为教授，他鼓励学生积极面对难题。故可以推测出他的个性。故A正确。