---I’m sorry for losing your book. I will buy a new one for you.
--- . I have another copy.
A. Thank you
B. Happy to hear that
C. Never mind
D. Of course
网友回答
A. Thank you
B. Happy to hear that
(答案→)C. Never mind
D. Of course
解析：情景交际。Thank you 谢谢你；Happy to hear that 很高兴听到那个消息； Never mind不要介意； Of course当然了。句意：很抱歉丢了你的书。我给你买本新的。结合下文，我还有一本呢。可知选C，最符合语境。