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

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＿＿＿my guests in my office.

A. is being met

B. will meet

C. will be meeting

D. will have met

答案：

A. is being met

B. will meet

(答案→)C. will be meeting

D. will have met

解析：by then 是指将来的时间状语，排除A。再由句意可知，meet指的是到了十点钟时将正在进行的动作。