单选题In this district for&nbsp

问题补充：

单选题Inthisdistrictforfivemonthsormoreoftheyear,noconstructioncanbedone_______therainyseasonmakesitimpossible.A.beforeB.whileC.untilD.when

答案：

D解析考查关系副词when引导定语从句，指代five months or more of the year。