问题
选择题
If you are traveling_______the customs are really foreign to your own, please do as the Romans do.
A．in which
B．what
C．when
D．where
答案
答案：D
这里没有地点名词作先行词，可见是由where引导的地点状语从句而不是定语从句，因此不能换为in which。
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