—I’m sorry to keep you waiting for me so long.
—_______

1. A.
   I don’t think so.
2. B.
   Don’t say so.
3. C.
   It doesn’t matter.
4. D.
   I’d love to.

----I’m sorry to keep you waiting for me so long.

-----________.

A. I don’t think so　 B. It doesn’t matter C. Don’t say so D.I’d love to

1 

—I’m sorry to keep you waiting for me so long.

—_______

A.I don’t think so.B. Don’t say so.  C. It doesn’t matter.        D. I’d love to.