Material abundance has been the life blood which has ______ Americans in their b

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问题 Material abundance has been the life blood which has ______ Americans in their basic beliefs and values.

选项 A、contributed
B、provided
C、favored
D、sustained

答案 D

解析动词辨析。sustain意为“维持(生命、活力等)，使……持续”；contribute意为“捐(款)，捐助”；provide意为“提供”；favor意为“支持……，赞同……”。

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Materialabundancehasbeenthelifebloodwhichhas______Americansintheirb