–You are really crazy about music!– Sort of. I always find in music peace which is missin

–You are really crazy about music!
– Sort of. I always find in music peace which is missing in world full of challenges.
A. /; the
B. /; a
C. a; the
D. the; a

A. /; theB. /; aC. a; the(答案→)D. the; a解析：句意：--你对音乐很着迷！--有点，我总是在音乐中发现在充满挑战的世界中是缺少的宁静。第一空填the，特指“在充满挑战的世界中是缺少的宁静”，第二空填a，泛指“一个充满挑战的世界”，选D。

感谢回答