This is the housemy grandma lived twenty years ago.A. in thatB. in whichC. thatD. 不填

问题补充：

This is the housemy grandma lived twenty years ago.

A. in that

B. in which

C. that

D. 不填

答案：

A. in that

(答案→)B. in which

C. that

D. 不填

解析：考察定语从句。先行词是the house，定语从句的主语是my grandma,动词是不及物动词live，后面不加宾语。故句子很完整，要使用关系副词where,这里的where=in which.故B正确。