问题
选择题
There must be ______ book which could help .
A．some
B．any
C．one
D．one useful
答案
答案：A
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。)
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