—What will you be doing at 4:00 tomorrow afternoon?—I in my office.A. will be typingB. am

问题补充：

—What will you be doing at 4:00 tomorrow afternoon?

—I in my office.

A. will be typing

B. am typing

C. am about to type

D. will type

答案：

(答案→)A. will be typing

B. am typing

C. am about to type

D. will type

解析：该题考查将来进行时的用法。将来进行时表示在将来某一时刻正在进行的动作,常与表示将来的时间状语连用,例如:this evening, on Sunday, by this time, tomorrow, in two days, tomorrow evening等。