For the four-sentence (S1 to S4) paragraph below, sentences S1 and S4 are given. From the options P, Q, R and S select the appropriate sentences for S2 and S3, respectively (S1) The men and women took their places after the initial mingling, and immediately a surge of conversation filled the room. (S2) (S3) (S4) One or two of the women were actually bouncing up and down on the sofa cushions. (

• P So, the two parties had to lean forward, their elbows on their knees. (
• Q At the beginning they mingled awkwardly, clutching their drinks, and walking here and there. (
• R Several people made a last-minute dash to the bathroom before the conversation could start. (
• S The men’s chairs were far enough away from the women’s couches.