London, Reuters---What could annoy teenagers enough to make them stop hanging out with friends ...

London, Reuters---What could annoy teenagers enough to make them stop hanging out with friends ...

小题1:B 小题1:C 小题1:B 小题1:A

小题1:细节题,从第三段的句子:It sends out a sound that makes teenagers become so impatient and angry that they have to cover their ears tightly and walk away.可知这种装置可以发出噪音赶走年轻人.选B 小题1:细节题:从第三段的句子:The body’s natural ability to detect some wave bands (波段) decreases almost entirely after 20, so few adults can hear the sounds.可知20岁以上的人听不见这种声音.选C 小题1:从文章第一句话可知是路透社的一个新闻.选B 小题1:从最后一段的句子" It is controlled by the shopkeepers--if they can see through their window that there is a problem, they turn the device on for a while until the group has run away."可知店主可以用这个装置赶走肇事者.选A.