Is there a book in the desk?

Is there a book in the desk? there is a book in the desk 怎么改错 is there a book on the desk? is book a the in there bog the desk,on连词成句 in ,the,bog,there,desk,book,on,a,the,is连词成句 There is a book that is on the desk Is there a maths book in your desk 怎样回答 There is a desk in the classroom. there is a book on the desk .please _____it_____.填空 There is a book and two pens on the desk. There is a book on the desk.(改为否定句) there is a book on the desk改为复数句