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。