The following rephrasings were suggested to me:
(d) I find it imposible to tell him the true.
I find telling him the true is impossible.
(e) I think it fair to give him another explanation.
I think giving him another explanation is fair.
(f) I was told that this rephrasing is impossible.
He got that we were all against his proposal is into his head.
(i) It bothers me when a teacher forgets my name.
A teacher forgetting my name bothers me.