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    【题目】To keep healthy,everyone needs_____at least eight_____sleep at night

    A. to have;hour’s B. have;hours’ C. having;hour’s D. to have;hours’

    【答案】D

    【解析】

    句意：为了保持健康，每个人晚上都需要至少八小时的睡眠。考查动词形式和名词所有格辨析题。句中need是实意动词，表示“需要”，后接不定式形式，即need to do需要做某事，可排除BC两项。eight后接复数名词，根据句意语境，可知名词sleep需用所有格修饰，hours是所有格是在词尾加-’，故选D。

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