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

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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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