如图是探究物质燃烧条件的3个对比实验：

根据各实验得到相应的燃烧条件有：

Can you sing and ____(dance)?

听下面一段短文，根据所听内容完成下面的填空（每空填一词）。

    …often on the weekends．These parties may be held to ____certain time like birthdays，end of the school year，____and the New Year…The person who invites guests usually servers simple ____and a small amount  of food．The children may spend the evening talking，listening to music and ____．In the US …to have parties without their parents being ____． Some parties …