You'd better keep the windows open when you are_____ A sleeping B asleep
问题描述:
You'd better keep the windows open when you are_____ A sleeping B asleep
答
很高兴能够在这里回答你的问题,
B
be asleep 睡觉
当你睡觉时,你最好开着窗户.
be sleeping 是正在睡觉,
而这里是睡觉的时候,为一般现在时,所以选B