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