Вставьте a там, где это возможно.В остальных случаях вставьте some.Boy, bread, bottle, book, doll, fox, friend, car, banana, butter, meat, table, chair, coffee, rose, farm, park, salad, vase, corn, door, toy, water, game, pen, ...

a Boy, some bread, a bottle, a book, a doll, a fox, a  friend, a car, a banana, some butter, some meat, a table, a chair,  some coffee, a rose, a farm, a  park, some salad, a vase, some corn, a door, a toy, some water, a game, a pen, a man, a woman, a  snowman, some snowmen, some sportsmen, a cup, some jam, some backets, some glasses, a desk, some geese, a goose, some teeth, a tooth, some bottles, a bottle, some mice, a lemon, some lemonade, some lemons

a Boy, some bread, a bottle, a book, a doll, a fox, a friend, a car, a banana, some butter, some meat, a table, a chair, some coffee, a rose, a farm, a park, some salad, a vase, some corn, a door, a  toy, some water, a game, a pen, a man, a woman, a snowman, some snowmen, some sportsmen, a cup, some jam, some backets, some glasses, a desk, some geese, a goose, some teeth, a tooth, some bottles, a bottle, some mice, a lemon, some lemonade,some lemons