America will never again have as a nation the spirit of adventure as it ______ before the West was settled.

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问题 America will never again have as a nation the spirit of adventure as it ______ before the West was settled.

选项 A、could
B、did
C、would
D、was

答案B

解析 题意为:作为一个国家来说,美国将不再具有开拓西部前所具有的那种冒险精神,此题考查助动词。从意义来看,空格应填had,但主句中have是实义动词,为避免重复,可用助动词do替代,即用did替代had,故B为答案。
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