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：考查時(shí)態(tài)。第一空根據(jù)時(shí)間狀語(yǔ)before I joined them，可知表示在過(guò)去某個(gè)時(shí)間之前一直進(jìn)行的動(dòng)作，用過(guò)去完成進(jìn)行；第二空表是現(xiàn)在正在進(jìn)行。句意：在我加入他們之前，他們一直為這項(xiàng)計(jì)劃工作了幾乎一周，我們現(xiàn)在還在繼續(xù)進(jìn)行因?yàn)楝F(xiàn)在到目前為止還沒(méi)有出現(xiàn)好的結(jié)果。故A正確。

考點(diǎn)：考查時(shí)態(tài)

 

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