选词填空或根据提示写单词。
(1)Where_______( am  /  is  /  are ) the children?
(2)He is ________( play /  playing  ) basketball.
(3)_________( What  /  Where ) is the supermarket?  It is next to the school.
(4)I live _______( at  /  on ) No.2  Park Street.
(5)Where is the station?  Turn _______( left  /  on ), go straight on.