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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
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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 

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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.

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

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

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