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Most probably it will be another 7 hours _____ you can have next meal, so each of you must have your stomach full.
A.sinceB.whenC.afterD.before
D

试题分析:固定句式:It be 一段时间 before…一段时间以后某事才发生;如果before后面使用一般现在时,前面的主语使用将来时;如果before后面使用一般过去时,前面也使用一般过去时;句义:很可能7小时以后你们猜能吃下一顿饭,所以现在你们必须把肚子吃饱。故D正确。
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