Is there a maths book in your desk 怎样回答

Is there a maths book in your desk 怎样回答 Is there a maths book in your Is there a book in the desk? there is a book in the desk 怎么改错 Is there desk in your bedroom?怎么回答 Is there a computer on your desk?做否定回答 Is there a river in your hometown?怎样回答? -Is there a chair and two desk in your room? is there a book on the desk? What is on the desk?是用It is a book回答,还是There is a book there is a book on the desk.变否定,变一般疑问句,回答. is book a the in there bog the desk,on连词成句