本句绝对是强调句.如果没有上文,答案就是B.that
但原题是
— Where did you first meet your boyfriend?
— It was in the department store ______ he worked.
A.which B.that C.where D.what
回答是省略的回答 所以答案是C.where引导是定语从句
这是对地点状语强调的强调句型 主谓省略了
原句=It was in the department store where he worked that i met my boyfriend.