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45． of foreign players in America’s NBA ． A．The number.are increasing B．A number, has increased C．The number, has increased D．A number.are increasingToday 46 people live in cities．So there is usually little room in a city to grow food．47 of the land in a city is used 48 homes, shops, roads and parks．Most food for city 49 is grown in the countryside．It is often brought to the city by truck, train and plane．Some food is even carried into the city by car．Do you live in a city? If you 50 , think of all kinds of food you eat in a day．All of the food comes from the countryside．The wheatfor your bread is grown on farms in the countryside．So are vegetables．Water is 51 thing that cities get from the countryside．Everyone needs water every day．We use a little of it for 52．But we use even more to 53 bathtubs , run showers, and wash streets．The 54 used by cities comes mostly from rain．But people cannot use the rain that frills on cities．The rain 55 dirty as it falls 56 dirty air．Once it hits city buildings or streets, the rain will 57 more dirt．It is not good for drinking 58 bathing．So cities must reach out to the 59 countryside for water．There, the rain falls through 60 onto trees and grass．The fallen rain runs into rivers and lakes．So it is important to keep both cities and the countryside clean．【查看更多】

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of foreign players in America’s NBA ．

A．The number，are increasing B．A number, has increased

C．The number, has increased D．A number，are increasing

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