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
A
【解析】
試題分析：考查疑問詞+ever引導讓步狀語從句的用法：A．whenever 無論何時，每當， B．whatever 無論什么C．wherever 無論什么地方D．however無論怎樣，句意：每當到一個新地方，地圖是一個人最好的工具，選A。
考點：考查疑問詞+ever引導讓步狀語從句的用法
點評："no matter+疑問詞=疑問詞+ever"都可以引導讓步狀語從句，但no matter+疑問詞結構只能引導讓步狀語從句，而"疑問詞+ever"還可以引導名詞性從句。例如：Whatever (="No" matter what) you say, I won't believe you. 這是讓步狀語從句。
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C
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