America will never again have as a nation the spirit of adventure as it_____befo

游客2023-11-15  8

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 从意义上来看,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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