Listen to a short passage concerning American dating and fill in the missing information.[音频][音频][音频]Before marriage, younger Americans date each other, that is, they often go out together. Casual dating usually begins in the early teens, and in the late teens a ___1____ of steady dating develops. There is a great _____2____ that one goes to a dance with one person, to a football game with another, and to a picnic with a third.Sometimes two couples go out together. This is known as “ ___3___ dating”. Group dating is also ____4____ among young people. Large groups of boys and girls may ____5_____ together. Young people may go out together for a long time, which is, ___6_____, a public statement of their ___7_____ to marry. Men and women go out together _____8______ especially those in cities.This is “adult dating”. They ski together, dine together, either at restaurants or in each other’s homes. The American dating ___9____ is a rather casual one. Often young Americans who hardly know each other go out on dates. It is also _____10_____ for them to arrange a “blind date”, that is, a date between two young people who have not met before.