Walking is believed to be one of the best ways for a person to ______ healthy.

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问题 Walking is believed to be one of the best ways for a person to ______  healthy.

选项 A、reserve
B、preserve
C、stay
D、maintain

答案C

解析 此题考查动词词义。根据题干,该空动词应有“保持”之意,因此,应排除A项reserve“保留;预订”。B项、C项和D项都有“保持”之意,但preserve和maintain后需要接名词,但题干中给出的却是形容词healthy。C项stay+形容词意为“保持某种状态”,因此C项为正确答案。
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