There must be book which could help .A. someB. anyC. oneD. one useful

问题补充：

There must be book which could help .

A. some

B. any

C. one

D. one useful

答案：

(答案→)A. some

B. any

C. one

D. one useful

解析：some除了用作数量词外，还可用来泛指未知的人或事物。又如：There must besome reason for what he has done . (他所做的事肯定基于某种原因。)