America will never again have as a nation the spirit of adventure as it ______ before the West was settled.A.hasB.didC.wasD.would
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B解析此题考查同一动词重复使用时用助动词替代的用法。本句主句中的动词是have, as从句完整写出应是:“as it had the spirit of adventure...”,其中had应用与其时态一致的助动词did来代替。[A]项的时态不对,因为它是相对于一个过去的时间来说的;[C]项是系动词的单数过去时态,不能代替实义动词;D.项为一般过去将来时,时态不对。