—Have you finished your homework yet?—Not yet I to do it just a few minutes ago.A. get d

问题补充：

—Have you finished your homework yet?

—Not yet, I to do it just a few minutes ago.

A. get down

B. set out

C. set about

D. set up

答案：

A. get down

(答案→)B. set out

C. set about

D. set up

解析：get down to doing sth 开始做某事，set out to do sth 着手做某事，set about doing sth 开始做某事，set up 建立。故选B。