It over 10 years since my grandpa .A. is diedB. is has been deadC. has been was deadD.

问题补充：

It over 10 years since my grandpa .

A. is, died

B. is, has been dead

C. has been, was dead

D. was, has died

答案：

(答案→)A. is, died

B. is, has been dead

C. has been, was dead

D. was, has died

解析：考查句型结构it is +段时间+since从句，其中从句常用过去时。