Most probably it will be another 6 hours you can have next meal, so each of you must have your stomach full.
A. since
B. when
C. after
D. before
网友回答
A. since
B. when
C. after
(答案→)D. before
解析：句意：很有可能你将再过6个小时能吃下顿饭，所以你们中的每个人现在必须吃饱。Since自从；when当……时候；after在……之后；before在……之前。根据句意故选D。