Question

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

 

Answer 1

A

【解析】A 考察非谓语动词。据说现在世界上生成的所有能源的百分之60都是以废热的形式浪费掉了，produce和句子谓语is之间满意连词，故使用非谓语形式。Produce和逻辑主语energy之间逻辑上构成被动关系。用过去分词做后置定语。故A正确。