【題目】 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】

試題分析:句意:許多人直到他們病了才意識到健康的重要性。A. Since自從;B. Until直到;C. While當……時候;D. After在……之后,根據(jù)句意“直到……才”應選擇連詞until,故選B。

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