A machine which makes water out of air could bee the greatest household invention since the microwave． Using the same technology as a dehumidifier (除湿器)， the Water Mill is able to create a ready supply of drinking water by getting it from a limitless source－the air． The pany behind the machine says not only does it offer all alterative to bottled water in developed countries，but it is a solution for the millions who face a daily water shortage．
The machine works by drawing in damp air through a filter(过滤器) and over a cooling element which changes it into water droplets．It can produce up to 12 liters a day．The Water Mill will also produce more water when storms pass over, as the humidity（湿度）in the air increases．In keeping with its ecodevelopment，the machine uses the same amount of electricity as three light bulbs．
Inventor Jonathan Ritchey said：“The demand for water is off the chart．People are looking for freedom from water distribution systems that are shaky and unreliable”．
The machine，which is about 3 feet wide，is likely to cost￡800 when it goes on sale here in the spring．Its maker, Canadian firm Element Four, estimates that a liter of water will cost around 20 pence to produce．
Environmentalists claim half the world’s population will face water shortage because of climate change by 2080．One in five humans is said to lack access to safe drinking water．
The Water Mill is not effective in areas with below about 30 percent relative humidity, but with average relative humidity in England of more than 70 percent that won’t be much of an issue here.
【小题1】According to the author, the biggest advantage of the machine is its ．A．little power useB．unlimited sourceC．proper sizeD．high production【小题2】We can conclude from the passage that the machine ．A．can be used everywhereB．has not been on saleC．will replace the water distribution systemD．will solve the problem of water shortage【小题3】The underlined phrase “off the chart” in the passage means A．record-breaking．B．urgent．C．unbelievable．D．amazing．【小题4】What would be the best title for this passage? A．Microwave for Household UseB．Filter to Draw in Damp AirC．Mode Dehumidifier on SaleD．Machine to Make Water out of AirB
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(答案→)B
解析：文章大意:本文介绍了一项新发明:从空气制水的神奇的机器。
【小题1】细节理解题。由第一段可知,该发明最大的优点是空气取之不尽用之不竭。 B
【小题2】细节理解题。由第四段“The machine,which is about 3 feet wide,is likely to cost 800 when it goes on sale here in the spring”可知,该发明将取代水分配系统。选C
【小题3】猜词题：从第三段的句子：People are looking for freedom from water distribution systems that are shaky and unreliable”．可知人们在寻找一种方法摆脱不可靠的水分配系统，所以对水的需求是很紧急的，“off the chart”=urgent，选B。
【小题4】主旨大意题。由全文可知,本文介绍了一项新发明:从空气制水的机器。所以D项正确。