It is said that sixty percent of all energy ________ in the world today is being lost as wasted heat...
2022-11-26 07:38:36 44次 2014年高考二轮复习热点预测：专题6非谓语动词英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
It is said that sixty percent of all energy ________ in the world today is being lost as wasted heat.
A．produced B．producing
C．to produce D．having produced
本题链接：
