I soon found that the work I was doing had already been done, , I was wasting my time.
A. in a word
B. in other words
C. so that
D. above all
网友回答
A. in a word
(答案→)B. in other words
C. so that
D. above all
解析：考查固定搭配。A一句话；B换句话说；C以至于；D首先，最重要的是；句意：我很快就发现我正在做的工作已经被做了，换句话说，我是在浪费时间。故B正确。