I have no idea the book is to your English study.A. whether of great valueB. if of gre

问题补充：

I have no idea the book is to your English study.

A. whether, of great value

B. if , of great value

C. that , so value

D. how , very valuable

答案：

(答案→)A. whether, of great value

B. if , of great value

C. that , so value

D. how , very valuable

解析：考查从句和固定用法。同位语从句Whether the book is of great value解释idea的内容。第二空Of great value=valuable. of+名词=该名词转换成的形容词。