Question

【题目】 Many people do not realize the importance of health __________ they have fallen ill.

A. since B. until C. while D. After

Answer 1

【答案】B

【解析】试题分析：句意：许多人直到他们病了才意识到健康的重要性。A. Since自从；B. Until直到；C. While当……时候；D. After在……之后，根据句意“直到……才”应选择连词until，故选B。