Three___a pen and four book on the table.a:is b:are

Three___a pen and four book on the table.a:is b:are PEN AND PAPER怎么样 There____a pen and an eraser 改错Peter's pen and Millie's pen are like. switch positions fo ball 1 and 2 是什么意思啊 My new pen pal and I急. Where _____ my pen and pencil? where is my pen and bag是什么意思 pen pen pen pen Pen This is a pencil and a pen还是These are a pencil and a pen There is a pen and a pencil 还是There are a pen and a pencil This pen are Amy and Sandy's还是This pen are Amy's and Sandy's Where is my pen and pencil?还是Where are my pen and pencil? be动词填空 1.His pen and my pen ( ) black.2.You and I ( )fine.