阅读理解 Within fifteen years Britain and other nations should be well on with the building of huge industrial architectures for the recycling of waste. The word rubbish could lose its meaning because everything which goes into the dumps would be made into something useful. Even the most dangerous and unpleasant wastes would provide energy if nothing else. The latest project is to take a city of around half a million residents and discover exactly what raw materials go into it and what go out. The aim is to find out how much of these raw materials could be provided if a plant for recycling waste were built just outside the city. This plant would recycle not only metal such as steel, lead and copper, but also paper and rubber as well. Another new project is being set up to discover the best ways of sorting and separating the rubbish. When this project is completed, the rubbish will be processed like this: first, it will pass through a powerful fan to separate the lightest elements from the heavy solids; after that grounders and rollers break up everything that can be broken. Finally, the rubbish will pass under magnets (磁铁), which will remove the bits of iron and steel; the rubber and plastic will then be sorted out in the final stage. The first full-scale giant recycling plants are, perhaps, fifteen years away. Indeed, with the growing cost of transporting rubbish to more distant dumps, some big cities will be forced to build their own recycling plants before long.

单选题 The phrase "be well on with" in Line I of Paragraph 1 most probably means ______.

【正确答案】 A

【答案解析】语义题。文章第一句Within fifteen years Britain and．．．和最后一段第一句The first full-scale giant recycling plants are，perhaps，fifteen years away遥相呼应，表明应该在十五年之内做好建造recycling plants的准备，故答案为A。

单选题 The passage is mainly about ______.

单选题 According to the passage, the first full-scale giant recycling plants will ______.

单选题 According to the passage, the reason for big cities to build their own recycling plants is that ______.

【正确答案】 B

【答案解析】细节题。首先用big cities to build their own recycling plants进行定位，根据文章最后一句with the growing cost of transporting rubbish to more distant dumps可知一些大城市需要建设自己的recycling plants是因为把垃圾拉到远处的垃圾场进行处理的成本很高，故答案为B。