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
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A. problems
B. difficulties
C. questions
(答案→)D. Chances
解析：考察固定句型；Chances are that...很有可能...结合句意可知D正确。句意：如果我们继续浪费资源，很有可能油井将会干涸，环境会被毁灭。