---Where did you buy the T-shirt?
---It was in the shopping mall my mother works.
A. that
B. where
C. which
D. from which
网友回答
A. that
(答案→)B. where
C. which
D. from which
解析：考查定语从句和强调句型。本题容易错选A项。定语从句where my mother works修饰先行词the shopping mall，在works后面省略了强调句的后半句I bought the T-shirt.句意：—你在哪里买到那件T恤的？—就是在我妈妈工作的那个购物中心里我买到的。故B正确。