ⅰ.阅读理解
(2014•沈阳质量监测)if you see a group of people dancing and singing on the street or in the railway station，you don’t need to feel surprised.they are a flash mob(暴民)．who are they? are they mobs? don’t be confused by their name.actually，a flash mob is a group of people who gather suddenly in a public place，do something unusual for a brief period of time，and then quickly disappear.
