They on the program for almost one week before I joined them,and now we it as no good results have e 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
网友回答
(答案→)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
解析:第一个动作发生在“我” 加入之前,又由于现在还在做,所以它的时态应用过去完成进行时;now证明第二个空格与现在有关,所以满足条件的只有A项。