If the people of the world continue to use our oil reserves at the current rate, we will have to find new reserves, the size of Saudi Arabia's reserves, every _____ years.
a. 100
b. 50
c. 25
d. 20
e. 10
Answer: E
If the people of the world continue to use our oil reserves at the current rate, we will have to find new reserves, the size of Saudi Arabia's reserves, every _____ years.
a. 100
b. 50
c. 25
d. 20
e. 10
Answer: E