7.  A party may put in evidence at the trial of a cause or matter, or of any issue therein, some only of the answers to interrogatories, or part only of such answer, without putting in evidence the other answers or, as the case may be, the whole of that answer, but the Court may look at the whole of the answers and if of opinion that any other answer or other part of an answer is so connected with an answer or part thereof used in evidence that the one ought not to be so used without the other, the Court may direct that that other answer or part shall be put in evidence.