—-Is it possible for us to meet at ten o’clock tomorrow morning?—-Sorry it is certainly n

问题补充：

—-Is it possible for us to meet at ten o’clock tomorrow morning?

—-Sorry, it is certainly not. I an important meeting then.

A. attend

B. am attending

C. will attend

D. will be attending

答案：

A. attend

B. am attending

C. will attend

(答案→)D. will be attending

解析： 考查动词时态。根据时间状语at ten o’clock tomorrow morning，可知是说明天早晨6点钟正在开会。所以用将来进行时态。选D。