he is very friendly to his fans为什么用friendly?friend不行吗?

he is very friendly to his fans为什么用friendly?friend不行吗? He is always (friend,friendly)to his students He is very friendly Nike is very friendly to everyone.he never f my father is very friendly ( )his work A good friend is friendly to others. His mother is friendly to us,but his father is ____(friend) Mr Wang is very friendly to us The man is very (friendly)to me friendly,he,always,to,eveyone,is He is very----(严肃的)but very friendly to us all. He is friendly.friendly划线提问