改错 There are two pencil-box on the desk Let's play a ping-po

改错 There are two pencil-box on the desk Let's play a ping-po There are a pencil and two pens on the desk. There ____ pencil-box,two books and some flowers on the desk There are a book and two rulers on the desk句子改错 There are a book and two pencils on the desk.改错 there are two books on the desk.one is comic,the other is po there ____ a pencil,two pens and there books on the desk,but A pen and pencil box on the desk There is a book,two pencils and a box on the desk.请问用There i There( are )(a book)and (two pens)(on) the desk There are a book and two pens on the desk . 改错 Are there some pencils in the pencil-box?