Question

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

Answer 1

A

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。