Question

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

Answer

A

【解析】

试题分析：句意：在我加入他们之前，他们一直为这项计划工作了几乎一周，我们现在还在继续进行因为现在到目前为止还没有出现好的结果。第一空根据时间状语before I joined them，可知表示在过去某个时间之前一直进行的动作，用过去完成进行；第二空表是现在正在进行，故选A。

考点：考查动词时态的用法。