—I will pick you up at 6 tomorrow morning. —So early! I then.A. will sleepB. will have s

问题补充：

—I will pick you up at 6 tomorrow morning.

—So early! I then.

A. will sleep

B. will have slept

C. will have been sleeping

D. will be sleeping

答案：

A. will sleep

B. will have slept

C. will have been sleeping

(答案→)D. will be sleeping

解析： 句意：--我明天早上6点会去接你。--这么早！那时我将正在睡觉。Then指的是at 6 tomorrow morning.所以用将来进行时，选D。