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

 

A

【解析】

試題分析:句意：我在加入他們之前，他們從事這個(gè)項(xiàng)目已經(jīng)有幾乎一周的時(shí)間了，現(xiàn)在我們?nèi)匀辉谧鲞@個(gè)項(xiàng)目，因?yàn)榈侥壳盀橹惯�沒有好的結(jié)果出來。根據(jù)時(shí)間狀語從句before I joined them可以判斷主句應(yīng)該用過去完成時(shí)，而后句中的now決定了第二個(gè)空的時(shí)態(tài)是現(xiàn)在時(shí)態(tài)，故答案選A。

考點(diǎn)：考查動(dòng)詞時(shí)態(tài)。

 

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