Ответ:

  1. She loves animals. She wants to become a vet.
  2. Does your brother have to work overtime at work?
  3. David has a degree in linguistics. He can tell you anything you want to know about the English language.
  4. My father works as a freelancer from home.
  5. Who is the author of this novel?
  6. Does your father often work overtime?
  7. His salary is €40,000 a year.
  8. A cashier is a person people pay money to in a shop.
  9. I get bad grades in chemistry. I don’t like science!
  10. My brother works hard because he has to meet tight deadlines.

В предложениях 2 и 6 подходит одно и то же слово: overtime.