（2007合肥二次質(zhì)檢模擬）We ________ keep a cool head on over--heating development, for it ____ have negative influence upon national economy.


  1. A.
    should; must
  2. B.
    must; would
  3. C.
    might; could
  4. D.
    must; may
D
句意：我們必須要對過熱的發(fā)展保持冷靜的頭腦，因為它會給國家經(jīng)濟(jì)帶來負(fù)面影響。依據(jù)句意可知，第一空是“必然，必定，必須”的意思，屬于must的基本用法，而第二空表達(dá)的負(fù)面影響只是表示一種可能性，是“或許，也許”推測之意。故D正確。
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