You'd better keep the windows open when you are_____ A sleeping B asleep

You'd better keep the windows open when you are_____ A sleeping B asleep
You'd better keep the windows open when you are_____ A sleeping B asleep

You'd better keep the windows open when you are_____ A sleeping B asleep
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

B对
be asleep 表示状态
加油！不明白再问！如果帮到你，请采纳，谢谢！

A sleeping