If you had joined the chat room ten minutes ago, you ______what we were talking about!

   A. have known            B. knew         C. would have known D. would know

 If you had joined the chat room ten minutes ago, you _____________what we were talking about.  

A. would know        B. would have known       C. knew      D. had known

 If you had joined the chat room ten minutes ago, you _____ what we were talking about.

   A. will know        B. are knowing        C. can know         D. would have known

If you had joined the chat room ten minutes ago, you _____ what we were talking about

1. A.
   will know
2. B.
   are knowing
3. C.
   can know
4. D.
   would have known

If you had joined the chat room ten minutes ago, you ______what we were talking about.

1. A.
   would know
2. B.
   would have known
3. C.
   knew
4. D.
   had known