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．a(chǎn)fterD．before
D

試題分析：固定句式：It be 一段時間 before…一段時間以后某事才發(fā)生；如果before后面使用一般現(xiàn)在時，前面的主語使用將來時；如果before后面使用一般過去時，前面也使用一般過去時；句義：很可能7小時以后你們猜能吃下一頓飯，所以現(xiàn)在你們必須把肚子吃飽。故D正確。
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