012.
Recently the term "health" has a wider meaning than it used to. It no longer means just the absence of illness. Today, health means the well-being of your body, your mind and your relationship with other people. In talking about this, we often use another term "quality of life". Quality of life is the degree of satisfaction a person gets from life.
Why do people think more of quality of life than just the absence of disease? One reason for this has something to do with the length and the conditions of life that people can now expect. Medical advances have made it possible for people today to live longer and healthier lives. Imagine that you were born in the year 1900. You could have expected on average to live until about the age of 47. But if you were born in the year 1999, you could expect to live to the age of 75.

答案解析：
(1) 正确答案为B。根据Recently the term "health" has a wider meaning than it used to. 最近，“健康”这个词的意义要比之前的更丰富。可知，本文主要是有关健康这个词的不同意义的，因此B项正确。
(2) 正确答案为C。根据In talking about this, we often use another term "quality of life".在谈论这个的时候，我们通常会用到另一个词“生活质量”。可知，现在人们更关注生活质量，因此C项正确。
(3) 正确答案为B。根据Medical advances have made it possible for people today to live longer and healthier lives. 医疗水平的进步使今天的人们能更长寿，生活得更健康。以及之后举的例子，1900年的人平均寿命为47岁，而1999年人们的平均寿命为75岁，可知，20世纪人们的生活质量有大幅度的提升，因此B项正确。