- Is it convenient to you if I call you up at 9 o’clock tomorrow morning? I’m afrai

问题补充：

--- Is it convenient to you if I call you up at 9 o’clock tomorrow morning?

--- I’m afraid not. I a speech then.

A. was giving

B. will be giving

C. am giving

D. will have given

答案：

A. was giving

(答案→)B. will be giving

C. am giving

D. will have given

解析：考查时态。根据语境时间状语at 9 o’clock tomorrow morning，故用将来进行时，选B。