Question

--- When did you ________ to do the work?
--- Two months ago, we are through 80% of it at the moment

1. A.
   set off
2. B.
   set out
3. C.
   set up
4. D.
   set about

Answer 1

B
考查短语辨析。set off  出发，set out to do 着手做某事，set up 建立，set about doing sth 着手做某事，句意：你是什么时候着手工作的？两个月前，此刻我们完成了工作的百分之八十了。根据语境选B。