—Ring me at six tomorrow morning will you?—Why that early? I.A. will be sleepingB. have s

问题补充：

—Ring me at six tomorrow morning ,will you?

—Why that early? I.

A. will be sleeping

B. have slept

C. have been sleeping

D. will sleep

答案：

(答案→)A. will be sleeping

B. have slept

C. have been sleeping

D. will sleep

解析：根据at six tomorrow morning这个时间状语，可知这里是指从现在算起的将来某一时间按计划、安排将要进行的动作，故用现在将来进行时。表示明天早上六点我一定正在睡觉，所以用will be sleeping。