社会公共秩序的维护主要应靠（    ）

第30届奥运会于2012年7月27日20时12分在伦敦开幕，北京居民观看开幕式的当地时间是（   ）

要求：不少于5句话。

    Most English people have three names: a first name, a middle name and a family name. For example, my full name is Ann Allan Green. Green is my family name. Ann and Allan are my given names. People don't use their middle names very much.So we can say Ann Green. We can say Miss Green or Mrs. Green. But we can't say Miss Ann or Mrs. Ann. It's different from Chinese names. In China, the first name is the family name and the last name is the given name.