练习材料：

L47-2: Too high a price?

Burglar alarms going off at any time of the day or night serve only to annoy passers-by and actually assist burglars to burgle. Car alarms constantly scream at us in the street and are a source of profound irritation. A recent survey of the effects of noise revealed (surprisingly?) that dogs barking incessantly in the night rated the highest form of noise pollution on a scale ranging from 1 to 7.

The survey revealed a large number of sources of noise that we really dislike. Lawn mowers whining on a summer's day, late-night parties in apartment blocks, noisy neighbours, vehicles of all kinds, especially large container trucks thundering through quiet villages, planes and helicopters flying overhead, large radios carried round in public places and played at maximum volume. New technology has also made its own contribution to noise. A lot of people object to mobile phones, especially when they are used in public places like restaurants or on public transport. Loud conversations on mobile phones invade our thoughts or interrupt the pleasure of meeting friends for a quiet chat. The noise pollution survey revealed a rather surprising and possibly amusing old fashioned source of noise. It turned out to be snoring! Men were found to be the worst offenders.

任务配置：L0+L4

知识笔记：

burglar n.小偷，窃贼

profound adj.影响深刻的

burglar alarm 防盗警报器

irritation n.恼怒

incessant adj.不断的

snore v.打鼾

offender n.罪犯

练习感悟：

Never leave the things until tomorrow you can do today.