单选题 It is advisable to ______ an electric wire with rubber in order to secure safety.
A. desolate B. resolute C. insolate D. insulate

【正确答案】 D

【答案解析】[解析] 四个选项的意思分别是：desolate毁坏，破坏；resolute坚决的，刚毅的；insolate暴晒；insulate使绝缘。句意是，为了确保安全，用橡胶把电线绝缘是很好的建议。所以正确答案是D选项，如：Asbestos can be used to insulate a cooking stove．(石棉能用来使烹调用的炉灶绝热。)