单选题:分包人不能按时开工,应在约定开工日期前(  )d向承包人提出延期开工要求,并陈述理由。

题目内容:
分包人不能按时开工,应在约定开工日期前(  )d向承包人提出延期开工要求,并陈述理由。 A.5
B.7
C.14
D.28

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