A good dictionary is of ________ for our English study.

A good dictionary is of ________ for our English study.

A.price

B.cost

C.help

D.helpful

答案及解析: C

解析:

“be of+抽象名词”结构,通常用来表示人或事物的性质和特征.题意为“一本好字典对我们学习英语很有帮助.”