---Thishistorybookisofgreatvalue.  ---Exactly.

问题详情：

 --- This history book is of great value.

   --- Exactly. _____ can be enjoyed from it ______ you have a deep understanding of it, however.

   A. Nothing; unless  B. Few; till

   C. Something; until D. Little; since

【回答】

A

知识点：相似 相近词比较

题型：选择题