Lf we our energy resources wastefully. our civilizationno future. A)are using / has
B)use / will take
C)will use / has
D)used / had​

A

Explanation:

A) Are using / Has

Explanation:

If we are using our energy resources wastefully, our civilization has no future.

D) Doesn't work, because it has past tense, C can't work, because it has future tense and so does B. So, therefore only leaving A, with the present tense. I Hope This Helps :)

the statement flat characters usually only have one trait that is developed in their story lines is true.