I don’t know ____ everyone in my class thinks I’m funny.

    A. why is it that     B. why it is that    C. who is it which   D. who it is that

I don’t know ____ everyone in my class thinks I’m funny.

1. A.
   why is it that
2. B.
   why it is that
3. C.
   who is it which
4. D.
   who it is that

I don’t know ____ everyone in my class thinks I’m funny.

    A. why is it that     B. why it is that    C. who is it which   D. who it is that

I don’t know _____________ everyone in my class thinks I’m funny.

A. why is it which　　　　　　　　　　　　　　　　　　 B.why it is that

C.who is it which　　　　　　　　　　　　　　　　　　  D.who it is that

A. why is it which　　　　　　　　　　　　　　　　　　 B.why it is that

C.who is it which　　　　　　　　　　　　　　　　　　  D.who it is that