The book is of great valuecan be enjoyed from it until you have a deepunderstanding of

问题补充：

The book is of great value. can be enjoyed from it until you have a deep

understanding of it, however.

A. Nothing

B. Few

C. Something

D. Much

答案：

(答案→)A. Nothing

B. Few

C. Something

D. Much

解析：后句的意思有“直到—才”故A符合。