Paragraph TenSafar’s work began to change our perceptions of death - blurring the point that is meant to mark the end of our lives. “We’ve all been brought up to think death is an absolute moment - when you die you can’t come back. It used to be correct, but now we’ve come to understand that even after you’ve become a cadaver, you’re still retrievable.“The boundary between life and death is less and less c _____.
【正确答案】：clear
【题目解析】：这里说的是生死之间的界限越来越不清楚。
