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

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

B. covers

C. says

D. teaches

解析：考查动词辨析：句意：大多数学生认为他的书很有用，因为它包含他们需要知道的所有的细节。B. covers 是“包含，涉及”，A. deals要和with搭配，表示“涉及”C. says说，D. teaches教，选B。