Itmeansthathewassleepingquicklyanddeeply。“hewasfastasleep”是一个英语句子，表示某人睡得很快、很沉。简短回答，说明句子的意思是某人快速入睡并且进入了深度睡眠状态。
1.He was fast(asleep )when the thief broke into his house.2.A report came to the police,saying a little girl had been( missing)for two days.3.The second half of the performance will begin in two minutes,and you are kindly saked to( replace)your seats.4.A(n) (greenhouse...