单选题 When a number of people______together in conversational knot, each individual expresses his position in the group by where he stands.

【正确答案】 C

【答案解析】[解析] cluster。意为“聚合成一串，聚成簇”，这里指人群聚集。pad意为“走，轻声地走或跑”；squeeze意为“挤压，挤着行动”；pack意为“打包，装箱，挤”。