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 1

A

試題分析：句意：在我加入他們之前，他們一直為這項計劃工作了幾乎一周，我們現(xiàn)在還在繼續(xù)進(jìn)行因為現(xiàn)在到目前為止還沒有出現(xiàn)好的結(jié)果。第一空根據(jù)時間狀語before I joined them，可知表示在過去某個時間之前一直進(jìn)行的動作，用過去完成進(jìn)行；第二空表是現(xiàn)在正在進(jìn)行，故選A。
點評：本題難度適中。動詞的時態(tài)是高中語法知識點的重難之一，需要考生掌握各種時態(tài)的用法，有分析理解復(fù)雜的句子結(jié)構(gòu)及語境的能力。
即學(xué)即練：Tom       in the library every night over the last three months.
A. works     B. worked     C. has been working     D. had been working
解析：C。句意：“在過去的三個月里，Tom每天晚上都在圖書館里學(xué)習(xí)�！鳖}干中出現(xiàn)的over the last three months，是明顯提示用現(xiàn)在完成進(jìn)行時或現(xiàn)在完成時。故選C。