I soon found that the work I was doing had already been done I was wasting my time.A. i

问题补充：

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

答案：

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。