If admissions are to be used at trial or are to be used either in support of or in opposition to a pretrial or post-trial motion, only those portions to be used shall be submitted to the court at the outset of the trial or at the filing of the motion or response thereto, insofar as their use can be reasonably anticipated by the party seeking to introduce such admissions. For purposes of this Rule, unless a genuine issue of authenticity is raised, a moving party need not produce portions of the original admission, but may rely on the submission of relevant excerpts from copies of the original request for admission and response thereto. Requests for admission and responses thereto, which have been submitted to the court pursuant to this rule shall be returned to appropriate counsel after final disposition of the case.