Be quiet! Your little brother in the bedroom now.A. slept B. sleeps C. will sleepD. is sl

问题补充：

Be quiet! Your little brother in the bedroom now.

A. slept

B. sleeps

C. will sleep

D. is sleeping

答案：

A. slept

B. sleeps

C. will sleep

(答案→)D. is sleeping

解析：句意：保持安静！你的小弟弟现在正在卧室睡觉。时间状语是now，因此是现在进行时。结构是be+动词的ing。故选D。