—Where did you go on National Day? —Jiuzhai Valley. I to go to France but the expense w

问题补充：

—Where did you go on National Day?

—Jiuzhai Valley. I to go to France, but the expense was too high.

A. planned

B. would plan

C. have planned

D. had planned

答案：

A. planned

B. would plan

C. have planned

(答案→)D. had planned

解析：考查时态和虚拟语气：句意：--国庆节你去哪里了？九寨沟，我本来计划去法国的，但是费用太高。从上文可知是本来计划做而没有做，plan用于过去完成时可以表示“虚拟语气”，选D。