—The room is in a mess again!

——Sorry. It is ______ who ______.

A. me, is to blame B. I, is to be blamed   C. me, am to be blamed D. I, am to blame

 I have always been honest and straightforward, and it doesn’t matter ___ I’m talking to.

A. who is it that B. who it is that C. it is who that D. it is whom that

It isn’t clear_____ is to blame.We need to find a solution to the problem first.

Jessica has always been honest and straightforward, and it doesn’t matter ______ that she’s talking to.

A．who is it          B．who it is           C．it is who           D．it is whom

I have always been honest and straightforward , and it doesn’t matter _____ I’m talking to .

A. who is it           B. who it is            C. it is who            D. it is whom