I have an apple on the desk.（就划线部分提问）,划线在on the desk 要怎么变特殊疑

I have an apple on the desk.（就划线部分提问）,划线在on the desk 要怎么变特殊疑 The picture are on the desk(对划线部分提问 划线部分是on the desk) here is only one book on the desk.(就划线部分提问）only one划线 There is a book on the desk.划线部分提问,划线部分是on the desk. There are two pens on the desk.(two pens就划线部分提问） There are some books on the desk.就划线部分提问.（急~） here is only one book on the desk.(就划线部分提问） I can see some cakes on the desk.(对划线部分提问） His schoolbag is on the desk on the desk 是划线的部分 对划线部分提问 is t 就划线部分提问:The book on the desk is (mine) There are Some books on the desk.（对划线部分提问） — —on the desk? There are (five books)on the desk.对划线部分提问：___on the desk?