They__________on the program for almost one week before I joined them, and now we ________on it as no good results have come out so far.

A．had been working; are still working

B．had worked; were still working

C．have been working; have worked

D．have worked; are still working

生产经营单位不得将生产经营项目.场所.设备发包或者出租给不具备安全生产条件或者相应资质的单位或者个人。