问题补充：
Though he is busy, music has always beenhis work.
A. as much a part of his life as
B. as a part of his life much as
C. as much as a part of his life
D. so much a part of his life as
答案：
(答案→)A. as much a part of his life as
B. as a part of his life much as
C. as much as a part of his life
D. so much a part of his life as
解析：这句话的意思是：尽管他很忙，但音乐和他的工作一样也是他生活的一部分。
As…as…和……一样，而so……as……也是“和……一样”的意思，但一般用于否定句中，所以排除D. As+adj/adv+其它+as+所对比的内容，所以应该选A.
