If we keep wasting so much energy, are that our oil wells will dry up and the environment will be destroyed.
A. problems
B. difficulties
C. questions
D. chances
网友回答
A. problems
B. difficulties
C. questions
(答案→)D. chances
解析：A. problems问题，B. difficulties困难，C. questions 问题，D. chances机会，句意：如果我们一直浪费这么多的能源，可能我们的油井会干涸，环境也会被破坏。这里是句型：Chances are that…“可能会…”，选D。