问题补充：
Background music may seem harmless, but it can have a powerful effect on those who hear it. Recorded background music first found its way into factories, shops and restaurants in the USA. Very soon it spread to other parts of the world. Now it is becoming difficult to go shopping or eat a meal without listening to background music.
To begin with, background music was intended simply to create a soothing (舒适的) atmosphere. Recently, however, its becoming a big business. An American marketing expert has shown that music can boost(提升) sales or increase factory production by as much as a third.
But it has to be the light music. Lively music has no effect at all on sales. Slow music can increase receipts(收入) by 34%. This is probably because shoppers slow down and have more opportunity to spot items they would like to buy. Yet, slow music isn always the answer. The expert found that in restaurants slow music meant customers took longer to eat their meals, which reduced overall sales. So restaurant owners might be well advised to play faster music to keep the customers moving-unless, of course, the resulting indigestion(消化不良) leads to complaints.
【小题1】Background music was first used .A．in the cinemas and theatres in the USAB．in the offices and hospitals in the USAC．in the schools and churches in the USAD．in the factories, shops and restaurants in the USA【小题2】An American marketing expert has found background music can .A．increase sales or factory productionB．create a soothing atmosphereC．make people slow downD．make people forget their worries【小题3】Slow music is useless in in increasing sales.A．shopsB．restaurantsC．factoriesD．cinemas【小题4】Restaurant owners are advised to play to increase overall sales.A．lively musicB．loud musicC．slower musicD．faster musicD
答案：
(答案→)D
解析：本文讲述的是背景音乐在不同的场合下的不同的作用。
【小题1】D 细节题。根据第一段第二句Recorded background music first found its way into factories, shops and restaurants in the USA.可知D正确。
【小题2】A 细节题。根据第二段最后一句An American marketing expert has shown that music can boost(提升) sales or increase factory production by as much as a third.可知A正确。
【小题3】B 细节题。根据第三段第三行The expert found that in restaurants slow music meant customers took longer to eat their meals, which reduced overall sales.可知在餐厅里播放轻音乐是没有效果的，反而会减少销量。故B正确。
【小题4】D 细节题。根据文章最后一段. So restaurant owners might be well advised to play faster music to keep the customers moving-unless, of course, the resulting indigestion(消化不良) leads to complaints.可知我们要建议餐厅里播放快速的音乐来增加销量。故D正确。
