问题补充：
----Where did you find the wallet?
---- It was at the stadiumI played football.
A. That
B. there
C. which
D. where
答案：
A. That
B. there
C. which
(答案→)D. where
解析：考查定语从句：根据句意：--你在哪儿找到钱包的？--是在我踢足球的体育馆找到的。说明这不是强调句，而是定语从句，先行词是the stadium，定语从句中缺少的地点状语，用where引导定语从句。选D。
