Keep it in mind not to disturb the president at two o’clock this afternoon when he a glo

问题补充：

Keep it in mind not to disturb the president at two o’clock this afternoon, when he a global joint meeting.

A. will host

B. hosts

C. is to host

D. will be hosting

答案：

A. will host

B. hosts

C. is to host

(答案→)D. will be hosting

解析：句意：记住下午两点钟的时候不要去打扰总统，到时他正在举行一个全球联合会议。时间状语at two o’clock this afternoon是将来的时间，将来某个时间正在干某事，要用将来进行时。A表示将来会发生某事；B是一般现在时，表示经常性，习惯性的动作；C也可表将来打算做某事。所以选D。