the apple is on the desk 这样回答应该怎么提问?

there is an apple on the desk There is an apple on the desk. 对the book is on the desk.怎么提问 the pen on the desk is mine对on the desk提问怎么答? Heien is pen is on the desk怎么提问 There is （an apple）on the desk.括号里提问 1,There is an apple on the desk.[改写一般疑问句,并作回答] There is()orange and ()apple on the desk. 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 His backpack is on the on the desk对on the desk画线提问 the tv set on the desk is new对on the desk 提问 The book on the desk is mine.对 on the desk 提问