–Did you go to Qingdao for vacation last summer?
--I______ to go, but I got sick at the last minute.
A. planned B. was planning C. had been planning D. have planned
–Did you go to Qingdao for vacation last summer?
--I______ to go, but I got sick at the last minute.
A. planned B. was planning C. had been planning D. have planned
C
plan这一动作在got sick之前发生,且表示那一段时间一直在计划,因此选用过去完成进行时。