I don't know______ he lost his gold watch yesterday.

       A. where is it that                        B. where was it that

       C. where it was that                            D. where is that

I don't know______ he lost his gold watch yesterday.

1. A.
   where is it that
2. B.
   where was it that
3. C.
   where it was that
4. D.
   where is that

I don't know______ he lost his gold watch yesterday.

I don't know______ he lost his gold watch yesterday.