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        1.       we were quite tired,        we still went on working.
          A.Because; /           B.Although; but            C.Although; /
          C

          試題分析:句意:雖然我們很累了,但是我們?nèi)匀焕^續(xù)工作。because 表示原因,意思是因為,在這里不符合句意。although 雖然,引導讓步狀語從句,不能和but 連用,故B不對;選C。
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