17.In big parties, how do people get to know each other?
在大型聚會上,人們怎樣相識?
By making self-introduction.
通過自我介紹。
18.When making self-introduction, how many minutes should it take?
做自我介紹時,多長時間為宜?
Half a minute, no more than one minute.
半分鐘,不能超過一分鐘。