My mother for 3 days in Shanghai.A. leftB. leaveC. was awayD. has been away

问题补充：

My mother for 3 days in Shanghai.

A. left

B. leave

C. was away

D. has been away

答案：

A. left

B. leave

C. was away

(答案→)D. has been away

解析：句意：我妈妈去上海三天了。根据句中for 3 days，可判断用现在完成时，故选D，短语be away 外出，是表状态，可与时间段连用；动词leave是瞬间动词，不能与时间段连用。