请问come up to the front of class 中,是come up 一组?还是up to 一组?

请问come up to the front of class 中,是come up 一组?还是up to 一组? Come up to the front of the room,please.中的come u意思是什么 come up to the hill come up doing还是come up to do come up with和come up to come up to 造句 come up to him come up to me come up to do sth come up to somebody是什么意思 come up to him 翻译, come up to的中文