题目内容
【题目】Many people do not realize the importance of health __________ they have fallen ill.
A. since B. until C. while D. after
【答案】B
【解析】
试题分析：句意：许多人直到生病了才意识到健康的重要性。直到……才……：not…until…。故选B。
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题目内容
【题目】Many people do not realize the importance of health __________ they have fallen ill.
A. since B. until C. while D. after
【答案】B
【解析】
试题分析：句意：许多人直到生病了才意识到健康的重要性。直到……才……：not…until…。故选B。