―What about 10 o’clock tomorrow morning? ―I’m afraid I can’t make it. I then.A. am going

问题补充：

―What about 10 o’clock tomorrow morning?

―I’m afraid I can’t make it. I then.

A. am going to take an exam

B. am taking an exam

C. will be taking an exam

D. an to take an exam

答案：

A. am going to take an exam

B. am taking an exam

(答案→)C. will be taking an exam

D. an to take an exam

解析：根据题干中的时间状语10 o’clock tomorrow morning可知，选项动作是在将来某个时刻正在进行的，故应选用将来进行时，口语中常用这种时态表示将来某时刻正在进行的动作或发生的事。