— I will come to attend your lecture at 10:00 tomorrow. — I’m sorry by then my lecture wi

问题补充：

— I will come 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

答案：

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.