My grandma dinner when I got home yesterday.A. cooksB. will cookC. is cookingD. was cooki

问题补充：

My grandma dinner when I got home yesterday.

A. cooks

B. will cook

C. is cooking

D. was cooking

答案：

A. cooks

B. will cook

C. is cooking

(答案→)D. was cooking

解析：四个选项分别对应一般现在时态、将来时态、现在进行时态和过去进行时态，根据时间状语，我昨天回到家时，可知主语为过去进行时态，选D。