（.) you met my parents,Kate?A is it where B.is it where that

答案是D where is it that you met my parents,Kate?
这是 对 作为地点状语的疑问副词 强调 的 强调句型 本句还是 特殊疑问句 故须用疑问词 置于句首
= where did you meet my parents,Kate?
强调句型 的构成 it is/was 加强调部分 加that 加其他
如 i met your parents in beijing
对地点状语强调 it was in beijing that i met your parents.
特殊疑问句 where did you meet my parents?
对where强调 where was it that you met my parents?
原句 用 was 比较好