题目内容
(2010·浙江余杭高级中学高三上第二次月考) 17. They _____ on the program for almost one week before I joined them, and now we _____ it as no good results have come out.
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
A
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