Ответ:

  1. uniform — students commonly wear a school uniform.
  2. timetable — it shows the lessons.
  3. school subjects — Russian and literature are school subjects.
  4. break — students rest between lessons.
  5. school day — it starts around 9 o’clock.

Ответ: 1 — a, 2 — b, 3 — b, 4 — a, 5 — b.