What does the word “it” in line 2 refers to? A. aging B. a living thing C. an illness D. an accident
Giải thích
Đáp án B
Thông tin nằm ở câu đầu đoạn 1: “Aging is the process of growing old. It occurs eventually in every living thing provided, of course, that an illness or accident does not kill it prematurely.”