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Large quantities of water ________ for cooling purpose in the only one of the plants that ________ steel in the city.

A.has been needed; produce

B.are needed; produces

C.is needed; produces

D.have been needed;produce

答案:B解析:考查時態和主謂一致。語意:這個城市唯一生產鋼材的工廠需要大量的水用于冷卻。第一空,謂語動詞應與quantities一致,由于陳述的是目前的狀況,因此,要用一般現在時,即are needed。第二空,定語從句的謂語動詞應與the only one保持一致。

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