sooner than they did when there was no rock music at all. 但在大声的和安静的音乐条件下，表演者看到红灯时刹车时间要比在没有摇滚音乐的情况下约快50毫秒。由此可知the loud and quiet music，rock music这三种音乐可以帮助他们在红灯时早点踩刹车。

　　【答案】　A

　　4．Which of the following is NOT true of loud music?

　　A．It helped the performers to brake sooner at red lights.

　　B．It helped the performers to be more careful.

　　C．It helped the performers to respond faster to objects suddenly stepping in the way.

　　D．It can do more good than harm to drivers.

　　【解析】　推理判断题。根据文章最后一句Since some accidents-such as children running into the road-take place without any notice, drivers listening to loud music must be less safe as a result.有一些交通事故，比如孩子突然跑到马路上--没有注意到就发生了。关键词less safe，说明这种情况下司机的反应慢。

　　【答案】　C

　　B

　　Riding a London subway, a person from China will notice one major difference: in London, people do not look at each other. In fact, eye contact is avoided at all times. That's not rudeness-people are just too busy to bother looking.

　　Busy doing what, you ask? Well, they're certainly not using the time for a moment of quiet reflection, nor are they reading a book. New technology has replaced quiet habits. Today the only acceptable form of book on the London underground is an e­book.

　　Apple must earn a fortune from London commuters(乘车上下班的人). Since the launch of the iPhone in 2007, over 40，000-yes, that's 40，000-"apps" (programs downloaded for the iPhone) have been designed.

Commuters love them because they are the perfect time­killers. One "app"， called iShoot, is a game that features tanks. Another one, Tube Exits, tells