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 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.
应用配置：L0+L4
知识笔记：Burglar/bɜrglər constantly/kɑnstəntli profound/proʊˈfaʊnd irritation/ɪrɪˈteɪʃən vehicles/vihɪkəlz container/kənˈteɪnər maximum /mæksəməm offenders/əˈfɛndərz
练习感悟：早上用时1小时，晚上再次用时1小时10分，这是今天课文得总用时。坑坑巴巴，艰难完成。课程难度越来越大，朗读得时间也花得太长。得控制。这一版也有瑕疵，没再调整。有个地方的复数没读出来，变成了单数，后面的段落也慢了下来。整篇读下来后，其实真正理解的可能没有全部，有些单次读起来顺，但是真要解释起来，真的记不起来了。