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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 worked; were still working D．have worked; are still working
查看习题详情和答案>>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
查看习题详情和答案>>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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