Quantities of water ________for cooling in the only one of the factories that ________steel.


  1. A.
    has been needed；produces
  2. B.
    have been needed；produce
  3. C.
    is needed；produce
  4. D.
    are needed；produces
D
考查主謂一致，Quantities of+名詞（可數(shù)或不可數(shù)）做主語時，謂語動詞用復(fù)數(shù)，所以第一空應(yīng)用復(fù)數(shù)形式，可排除A和C，第二空，one前面有the only修飾，故從句的動詞應(yīng)用單數(shù)，所以選D。
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