There be句型There __ a book,two pens and some rulers on the de

There be句型There __ a book,two pens and some rulers on the de there ___?__ a book and two rulers on the desk.要填什么? There __ a book and two pens on the desk.答案是is.为什么 There( are )(a book)and (two pens)(on) the desk There are a book and two pens on the desk . there were a book and two pens on the desk There a book and two pens on the desk. There is a book and two pens on the desk. There ( )a book, some pens and magazines on the table There are a book and two rulers on the desk句子改错 There are some water and two pens on the desk. 连词成句：there,a,book,and,pens,two,are,desk,the,on(.)