My cousin said the textbook was useless .It means that it isn't really _____A.able to use B.of much use

问题描述:

My cousin said the textbook was useless .It means that it isn't really _____
A.able to use
B.of much use

选B,因为of +名词相当于对应这个名词的形容词,例如,reading is of Much importance=Reading is very important,意思是朗读很重要.
题中 not Of much use = useless.故选B