1.（这问和这篇文章相关吗?文章好象没有给出这方面的信息.文章是完整的吗?）
2.Snooker and table tennis.
3.文章介绍了作为体育赛事的观众应该遵守的各种规则.所以本文的标题可以为“How to be a good spectator of sporting events”“rules for spectators in sporting events”一类的
4.Most sporting events have rules for spectators written on the back of the tickets．
大部分体育赛事都会在门票背后写明观众应当遵守的规则.
5.Applause is not welcome,however,while a game is in progress and the players need to pay all their attention to their performance.
然而,当比赛正在进行,并且运动员们需要全神贯注于他们的比赛时,掌声是不受欢迎的.