【题目】I have no idea____________ the book is __________ to your English study.
A. whether ; of great valueB. if ; of great value
C. that ; so valueD. how ; very valuable
在线课程【答案】A
【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。