sit on the floor为什么不可以说sit on floor?

sit on the floor为什么不可以说sit on floor? 翻译sit on the floor sit,floor,often,on,and,out,look,beach,the,at,the,i连词成句 The students sit in a c_____ on the floor with their teacher He saw linda _____(sit) on the floor when he walked into the We love to sit on the floor and look out at the beach and th you can sit on the second floor _____ the beautiful scenery. 好的加201,please don't____(sit)on the floor 2,he wishes he____( It's nice______(sit)on the floor and______(chat)with you. Don't litter the floor为什么 "the floor"前不加on? 变ing—— cry,eat,sit on the floor,wear warm clothes.注:已用逗号隔开 帮帮忙翻译一道题尽快帮我翻译一道题：You'd better sit on the second floor of th