They _____ on the program for almost one week before I joine

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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

They ____ on the program for almost one week before I joined 一道英语单选问题17.They（）on the program for almost one week before They_____on the program for almost one week before I joined We have been walking in the mountains for almost one week. You will have to wait for one more week,_____ the manager wi The class went on withthe story _____ they hadleft it before As they had been _____ our army for a week, the e Almost each student failed _____ the mathematics test on the One thing almost everyone is agreed on,including Americans,i They'er staying here for about one week.(for about one week被 the experiment___,they decided to go on holiday for a week.A There is only one week eft before the exam