9. The United States has a vast amount of newly
discovered clean geothermal (natural heat from the
Earth's crust) energy. Tapping into this energy source
could provide at least 10 times the energy that can be
obtained from the nation's known coal reserves. What
does "vast” mean?
A. large amount
B. not enough
C. dangerous
D. having no known use
Answers & Comments
A. LARGE AMOUNT
EXPLANATION:
THE WORD "VAST" REFERS TO A GREAT AMOUNT OF A CERTAIN AREA OR SPACE...
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