She sat at the desk and set about _____ a letter to her friend.

1. A.
   to write
2. B.
   writing
3. C.
   write
4. D.
   written

She sat at the desk and set about _____ a letter to her friend.

       A. to write            B. writing            C. write              D. written

She sat at the desk and set about _____ a letter to her friend.

She sat at the desk and set about _____ a letter to her friend.