问题
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
B:had worked; were still working
C:have been working; have worked
D:have worked; are still working
正确答案是：
同类题型
_____ Blacks are going to the park. Why don’t we go for _____ walk, too
I’m too busy_____ to my family often.—Why not call them instead
What do you think of ____________ 2013Asian Youth Games- I should say it was ________ success.
We regret to inform you that there are no tickets______ for Friday’s performance.