I really don't know()Ikept the secret papers. A it was where that B where it was that为什么不选A构成强调句而选B

I really don't know()Ikept the secret papers. A it was where that B where it was that为什么不选A构成强调句而选B
I really don't know()Ikept the secret papers. A it was where that B where it was that
为什么不选A构成强调句而选B

I really don't know()Ikept the secret papers. A it was where that B where it was that为什么不选A构成强调句而选B
选B
I really don't know 后面是一个从句.
从句是 where it was that I kept the secret papers.It is ..that...是强调句型,去掉这个是Where I kept the secret papers.
不好意思没看清题,Where 通常可以替换成 the place where.
know 是一个动词,后面要加宾语.