thomas615
Senior Member
- Joined
- Aug 20, 2010
- Member Type
- Student or Learner
- Native Language
- Chinese
- Home Country
- China
- Current Location
- Canada
I am not sure "on" or "to" after follow up. Which sentence is correct? My answer is (1). Correct?
1)We are writing to follow up on our letter of January 25th.
2)We are writing to follow up to our letter of January 25th.
1)We are writing to follow up on our letter of January 25th.
2)We are writing to follow up to our letter of January 25th.