Most students think this book is useful as it all the basic grammar rules they need to k

问题补充：

Most students think this book is useful as it all the basic grammar rules they need to know.

A. deals

B. covers

C. says

D. teaches

答案：

A. deals

(答案→)B. covers

C. says

D. teaches

解析：句意：大多数学生认为这本书是有用的因为它包括了所有的他们需要知道的语法项目deal处理； cover 包括； say说； teach教。根据句意故选B。