I really don’t know for certain they discussed.this important event very secretly.
A. where was it that
B. where it was that
C. where that
D. it was where that
网友回答
A. where was it that
(答案→)B. where it was that
C. where that
D. it was where that
解析：考查强调句型在宾语从句里边的用法。B选项符合。