问题补充：
In Australia, surfing is a popular sport among young people they can seek excitement and adventure.
A. that
B. which
C. whom
D. where
答案：
A. that
B. which
C. whom
(答案→)D. where
解析：句意：在澳大利亚，冲浪是年轻人中很受欢迎的运动，其中他们能够追求刺激和冒险。这句话用了定语从句，先行词是surfing，定语从句中不缺少主宾表，缺少的是地点状语，用where引导定语从句。选D。
