【题目】Few people paid full attention to their health conditions _____ they were seriously ill.
A.whenB.ifC.untilD.before
在线课程【答案】C
【解析】
考查连词辨析。句意：很少有人完全注意他们的健康状况直到他们患了重病。A. when 当……时候；B. if 如果 C. until 直到；D. before在……在之前。分析句意可知，本句为until引导的时间状语从句。故选C项。