2. 外语
  3. The latest project is to take a city of around half a million inhabitants and discovers exactly what raw materials 【S1

The latest project is to take a city of around half a million inhabitants and discovers exactly what raw materials 【S1

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问题     The latest project is to take a city of around half a
million inhabitants and discovers exactly what raw materials           【S1】______
go into it and what go out. The aim is to find out how much
of these raw materials could be provided whether a plant for           【S2】______
recycling waste were built just outside the city. This plant would
recycle not only metal such as steel, lead but copper, but also        【S3】______
paper and rubber as well as.                                           【S4】______
    Another new project is being set off to discover the best          【S5】______
ways of sorting and separating the rubbish. When this project
is complete, the rubbish will be processing like this: first, it will  【S6】______
pass through sharp metal bars which will tear open the plastic
bags on which rubbish is usually packed; then it will pass through     【S7】______
a powerful fan separate the lightest elements from the heavy           【S8】______
solids; after that grounders and rollers break up everything what      【S9】______
can be broken. Finally the rubbish will pass under magnets,
which will remove the bits of iron and steel; the rubber and
plastic will then sorted out in the final stage.                       【S10】______
    The first full scale giant recycling plants are, perhaps, fifteen
years away. Indeed, with the growing cost of transporting rubbish
to more distance dumps, some big cities will be forced to build
their own recycling plants before long.
【S3】
选项
答案but→and
解析 连词错误。such as之后为所举的关于metal“金属”的例子，这里所举的steel(钢铁)、lead(铅)、copper(铜)都属于金属，在意思上不是转折而是并列。因此，应把 but改为and。
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