Question

--- What were you doing this time yesterday?
　　--- I ______ on the grass and drawing a picture.

A．sit

B．sat

C．am sitting

D．was sitting

Answer 1

D

本题是对动词时态的考察，问句和答句时态上要统一，问句是过去进行时，对于过去的某一时间的动作提问，所以答句使用过去进行时。