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