语法与词汇 55.It was clear that the alcohol had seriously impaired Anderson's sense of reality.

【正确答案】 A

【答案解析】这句话的意思是：显然，酒精严重削弱了安德森对真实的感觉。画线词impair意为“减少、削弱”；weaken意为“削弱”；impress意为“铭记、留下印象”；enhance意为“加强”；strengthen意为“强化”。根据题意，答案为A。