—You’d better work out more.—Sometimes I . I had a walk after supper yesterday and I’ll go

问题补充：

—You’d better work out more.

—Sometimes I . I had a walk after supper yesterday and I’ll go to the gym tonight.

A. did

B. would

C. do

D. have

答案：

A. did

B. would

(答案→)C. do

D. have

解析：考查替代省略。work out表“锻炼身体；做运动”。此处是Sometimes I work out的省略形式。