--Where did you first meet your boyfriend?---It was in the department store he worked.A.

问题补充：

--Where did you first meet your boyfriend?

---It was in the department store he worked.

A. which

B. that

C. where

D. what

答案：

A. which

B. that

(答案→)C. where

D. what

解析：考查定语从句和强调句型。补充完整是It was in the department store he worked that I first met my boyfriend.定从 he worked的先行词是the department store，从句缺地点状语，所以选C, where。