---Did you go to Hawaii for the vacation?

---I _______to go, but I got sick at the last minute.

1. A.
   was planning
2. B.
   have planned
3. C.
   had been planning
4. D.
   have been planning

－Did you go to Hawaii for the vacation?

－I _______to go, but I got sick at the last minute.

[　　]

A． was planning　　　B． have planned

C． had been planning　 D． have been planning