Перед какими словами можно употребить артикли A/The: cat, frog, swim, his, cockerel, Ann, sing, clock, red, seven, pen, pencil, big, is, stick, Tom, hen, can, black, ten, dog, box?
Со всеми, кроме swim, his, Ann, sing, red, seven, big, is, Tom, can, black, ten.