You may see "in" used with "forum" from time to time. With the proper context, it can be correct. But based on your question, I believe it should be "on the forum","on the panel", and "on the board of directors".
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tinanam0102Hi teachers,
Could you correct the prepositions for me? Thank you.
1. I came across this advertisement for a clerk on Jobs.com, for which I'm interested in applying.
2. In this forum, we feature a number of painters whose works focus on the contemporary period. We invite you to join the poll inon / as t