He ________ to cut the grass, after he finished up talking to the neighbor over the garden wall．

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

He ____ to cut the grass, after he finished up talking to the neighbor over the garden wall.

A. set about        B. set out          C. set off         D. set up