Britain and other nations should be well on with the building of huge industrial complexes (工业园区)for the recycling of wastes within fifteen years. The word rubbish could lose its meaning because everything that 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 inhabitants (居民) and discover exactly what raw materials go into 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 was built just outside the city. This plant would recycle not only metal such as steel, lead (铅) and copper, but also paper and rubber as well.
Another new project is being set up to discover the best way of sorting and separating the rubbish. When this project is completed, the rubbish will be processed  like this: First, it will pass through sharp metal bars which will tear open the plastic bags in which rubbish is usually packed; then it will pass through a powerful fan to separate the lightest elements from the heavy solids; after that rollers will 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 (完全的) 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.
64. The underlined phrase “be well on with…” (Para. 1) most probably means _______.
A. have completed what was started      B. get ready to start
C. put an end to                               D. have achieved a great deal in
65. What is NOT mentioned as a part of the recycling process described in paragraph three?
A. Sharpening metal bars.            B. Sorting out small pieces of metal.
C. Breaking up whatever is breakable.   D. Separating lightest elements from the heavy ones.
66. What’s the main reason for big cities to build their own recycling plants?
A. To get raw materials locally.             B. To deal with wastes in a better way.
C. To get iron and steel from those plants.     D. To protect the environment from pollution.
67. The first full-scale huge recycling plants ______.
A. will be built fifteen years later      
B. began to operate fifteen years ago
C. will probably be in operation in fifteen years
D. will probably take less than fifteen years to build
68. The passage is mainly about _______. 
A. a cheap way to get energy       B. the location of recycling plants 
C. new ways of recycling          D. the probability of city environment