中考網(wǎng)整理了關(guān)于2021中考英語(yǔ)過(guò)去完成時(shí)專(zhuān)項(xiàng)練習(xí)題（十二），希望對(duì)同學(xué)們有所幫助，僅供參考。

　　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

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