Ответ:

  1. It's five past ten. — 10.05.
  2. It's five to eight. — 7.55.
  3. It's ten past eight. — 8.10.
  4. It's a quarter to two. — 1.45.
  5. It's half past three. — 3.30.
  6. It's twenty-five past one. — 1.25.