问题标题:
【______theaverageageofthepopulationincreases,therearemoreandmoreoldpeopletocarefor.()A.UnlessB.UntilC.AsD.While】
问题描述:
______ the average age of the population increases,there are more and more old people to care for.()
A.Unless
B.Until
C.As
D.While
刘大龙回答:
答案C.A.unless,表示除非;B.until表示直到…为止;D.while当…时.干扰项D项while引导时间状语从句,表示“当…时”,动词为延续性动词,表示持续的动作,强调状态.如,WhileI'mdriving,Ialways...
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