— Thanks a lot for your book. I found it very interesting.— . I’m glad you enjoyed it.A. A

问题补充：

— Thanks a lot for your book. I found it very interesting.

— . I’m glad you enjoyed it.

A. All the best

B. It is nothing

C. No thanks

D. Very well

答案：

A. All the best

(答案→)B. It is nothing

C. No thanks

D. Very well

解析：考查交际用语。A万事如意；B这没什么；C别管闲事；D好的。A、C、D不用来回答感谢。句意：谢谢你的书，我觉得它很有趣。这没什么，你喜欢看我很高兴。根据句意可知，选B。