Dr. Jeol Hiderbrand was also valuable to his country during both World Wars. In World War I he analyzed the poisonous gases used on the battlefield and helped develop a truck that could clean and treat soldiers’ clothes which had been contaminated by poisonous gases during fighting. In World War II, he helped develop a type of the snowmobile, a vehicle used to carry soldiers through the snow in northern countries.
6. Which of the followings is the main idea of the passage?
A. Dr. Jeol Hiderbrand’s discoveries and inventions.
B. Dr. Jeol Hiderbrand’s contributions to education.
C. Dr. Jeol Hiderbrand’s contributions to the world.
D. Dr. Jeol Hiderbrand, a versatile with ageless energy and vigor.
7.What’s the reason for Dr. Jeol Hiderbrand’s interest in chemistry?
A. His chemistry teacher was a great teacher.
B. His parents taught him chemistry when he was very young.
C. He was born in a time young people had greater freedom to decide what they wanted to do.
D. His talents were greater than his chemistry teacher.