第6题: [单项选择]When a number of people ____________ together in a conversational knot, each individual expresses his position in the group by where he stands. A. pad B. pack C. squeeze D. cluster 参考答案:D 答案解析:cluster是“群集,拥挤”。A.pad是“填塞”;B.pack是“塞满,打包”;C.squeeze是“挤压,压榨”。