17.In big parties, how do people get to know each other?
在大型聚会上,人们怎样相识?
By making self-introduction.
通过自我介绍。
18.When making self-introduction, how many minutes should it take?
做自我介绍时,多长时间为宜?
Half a minute, no more than one minute.
半分钟,不能超过一分钟。