根据提示，选择合适的内容补全句子。
（1） This is the ________ (teacher, teacher’s) desk.
（2） The pencil is _________ (on, in) the floor.
（3） She _________ (have, has) long hair.
（4） I have a new friend. He is _________ (friendly, friend).
（5） How many _________ (people, peoples) are there in your family?