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

 They _______ on the program for almost one week before I joinedthem, and now we________ on it as no good results have come out so far.

A. had been working; are stillworking       B. had worked; were still working

C. have been working; haveworked       D. have worked; are still working

试题答案

【答案】

 A

【详解】由before I joined them在我加入之前，加入就是过去时态，加入之前应当使用过去完成时。 又从no good result have come out（还没出好结果）可以得出，现在我们仍然正在继续这个项目。用现在进行时，所以答案为A。