Of all the methods they provided is of any help for solving the math problem.A. noneB.

问题补充：

Of all the methods they provided, is of any help for solving the math problem.

A. none

B. no one

C. nothing

D. neither

答案：

(答案→)A. none

B. no one

C. nothing

D. neither

解析：A 考察代词。句意：在他们提供的方法中，没有一个方法能够帮助解出这道题。有范围排除D项。No one只能指人；none=not any ,not one一点也没有，一个也没有；即数量概念。既可以指人，也可指物。

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