Anesthetics are substances______to deaden pain or produce a condition in which some or all of the senses, especially touch, stop functioning or are reduced.
【正确答案】 D
【答案解析】各项的意思是：divert使转移；enforce实施，迫使；exercise练习，行使；administer管理，作为治疗或药物使用。根据句意判断，答案为D。