Last week I took the Civil Service Admission Examination for which I for nearly three mo

问题补充：

Last week I took the Civil Service Admission Examination, for which I for nearly three months．

A. had prepared

B. would prepare

C. was preparing

D. have been preparing

答案：

(答案→)A. had prepared

B. would prepare

C. was preparing

D. have been preparing

解析：考查时态。句意为上个星期我参加了公务员考试，为了这次考试我已经准备了三个月了。根据句意可知准备了三个月发生在考试之前，故选择过去的过去。