They on the program for almost one week before I joined them, and now we it as n

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.

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

试题答案

A

解析:

此题考查的是时态问题。从before引导的从句中的过去时态可知主句的时态应为过去完成时。故排除C、D。从意思上可以看出他们一直工作了一周，强调动作的连续，同进 now也提示出后面应用现在进行时。故答案为A。