Ответ:

  1. giraffes — they
  2. a book — it
  3. Alice — she
  4. Tom — he
  5. people — they
  6. Oscar and you — you
  7. an elephant — it
  8. my sister and I — we
  9. an old man — he
  10. my mother — she
  11. my friends and I — we

Ответ: Your brother and you — you; giraffes — they; a book — it; Alice — she; Tom — he; people — they; Oscar and you — you; an elephant — it; my sister and I — we; an old man — he; my mother — she; my friends and I — we.