Any party may, at the trial of a suit, use in evidence any one or more of the answers or any part of an answer of the opposite party to interrogatories without putting in the others or the whole of such answer :

Provided always that in such case the Court may look at the whole of the answers, and if it shall be of opinion that any others of them are so connected with those put in that the last-mentioned answer ought not to be used without them, it may direct them to be put in.