Everyone learns English - unit 3: classroom (a/an/-s)Versión en línea grammar por Duong Tuan 1 Five Crayons Yes No 2 Four Cat Yes No 3 A Letter Yes No 4 Twelve Ball Yes No 5 An Cupboard Yes No 6 Two number Yes No 7 Eleven Pencils Yes No 8 Three bananas Yes No 9 Six Rulers Yes No 10 An Egg Yes No 11 An Bag Yes No 12 A Tables Yes No 13 A Friend Yes No 14 A Flowers Yes No 15 A Book Yes No 16 An pen Yes No 17 An Orange Yes No 18 An apple Yes No 19 A Teachers Yes No 20 A Chair Yes No