The Great Wall is a place almost all tourists would like to visit when they come to Beiji

问题补充：

The Great Wall is a place almost all tourists would like to visit when they come to Beijing．

A. why

B. which

C. when

D. where

答案：

A. why

(答案→)B. which

C. when

D. where

解析：考查定语从句。本定语从句的先行词是a place, which指代先行词在句中作为visit的宾语，ACD三项都是关系副词，在句中做状语。故B正确。