A book,a pen,a ruler and an eraser___on the desk.请问是填is还是are?要用就进原则吗?

A book,a pen,a ruler and an eraser___on the desk.请问是填is还是are?要用就进原则吗? is that your a book?哪里错了This is a pen and that's a ruler?Is this his pencil?哪里错了!求 连词成句：pen, book, ruler,a, I,my,need ,and,math,a问题是唯一的吗?还是有好几种? 选出下列每组中不同类的词( )1、A.pig B.monkey C.panda D.money( )2、A.book B.shop C.pen D.ruler The penilbox _____ _____ a ruler _____ an English book. There( ) a pen and a book on the tabie . I don t buy a book ( ) a pen. this’s a pen and that’s a ruler.哪里错了 What _______ (be) on the desk just now?There ______ (be) a pen and a ruler. ( ) you( ) a ruler? A red ruler Is it a ruler? there two pencils,a pen,a rubber and a knife in it.And there is a long ruler I __ a pencil-box,a pen ,a ruler and two __ . I have a bike,___ the pen is tom's.what a() the ruler?it's mine Can I borrow your ________?A.pen 　B.ruler 　C.pencil（尺子） this is a （ruler) 对括号提问 the pen is （on the desk） I have a book and pen.变成一般疑问句