I regret _________ going on a holiday to France because of the bad weather last week.

1. A.
   having given up
2. B.
   to give up
3. C.
   having given back
4. D.
   to give back

 I regret _________ going on a holiday to France because of the bad weather last week.

A. having given up                       B. to give up 

C. having given back                      D. to give back