Fred’s grandfather three years ago. He for three years.A. died; diedB. was dead; diedC. di

问题补充：

Fred’s grandfather three years ago. He for three years.

A. died; died

B. was dead; died

C. died; has been dead

D. died; has died

答案：

A. died; died

B. was dead; died

(答案→)C. died; has been dead

D. died; has died

解析：die是非延续性动词，不能和段时间状语连用；be dead 表示状态，可以和段时间状语连用。