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8. What distinguished Dr. Jeol Hiderbrand from others as early as in high school?
A. He was given the key to the chemistry lab
B. His discovery of the correct formula for some chemical compound.
C. He learned more chemistry from his teacher
D. His excellent score in chemistry learning.
9. The use of helium for deep-sea diving_________________.
A. helped to overcome the physical discomforts the divers experienced when nitrogen was used
B. was found by Dr. Jeol Hiderbrand
C. is still universally acknowledged as standard practice up to now
D. All that is included in A, B, and C
10. According to Dr. Jeol Hiderbrand what accounts for his ageless energy?
A. His ancestors.
B. His parents.
C. Heredity.
D. Hard working.
Text 3
11. Which of the following can be best used as the title of the passage?
A. Retired People
B. Retirement Centers
C. The Increase of Aging Population
D. A Demographic Trend
12. According to the passage there is a growing number of aged people relocating their homes because _______.
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