— I will e to attend your lecture at 10:00 tomorrow.
— I’m sorry, by then my lecture will have ended and I in my office.
A. am working
B. will work
C. will be working
D. will have worked
网友回答
A. am working
B. will work
(答案→)C. will be working
D. will have worked
解析：
试题分析: 明天上午十点我去听你的讲座。——抱歉，到那时我的讲座已经结束了，我将正在办公室工作。根据上文提到的时间at 10:00 tomorrow 和by then可知此处指将来某个时间正在做的事情，用将来进行时，答案选C.