The latest project is to take a city of around half amillion inhabitants an

游客2023-09-10  22

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. [br] 【S1】

选项

答案 discovers→discover

解析 并列结构错误。本题的关键在于判断连词and之后的部分与前文中的哪一部分并列。本句的意思是:近期开展的一项工程是选取一个人口大约50万的城市,看哪些原材料流进,哪些原材料流出。从语义上可以看出,and后面的部分不是与系动词is并列,而是与不定式to take a city of around half a million inhabitants并列,共同作is的表语。因此,应把discovers改为discover。
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