The map is one of the best tools a man has he goes to a new place．
A. whenever
B. whatever
C. wherever
D. however
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(答案→)A. whenever
B. whatever
C. wherever
D. however
解析：考查疑问词+ever引导让步状语从句的用法：A．whenever 无论何时，每当， B．whatever 无论什么C．wherever 无论什么地方D．however无论怎样，句意：每当到一个新地方，地图是一个人最好的工具，选A。