ස්මාර්ට්ෆෝන් සමීක්ෂණය

How long do you use your smartphone for lecture and study-related activities per day?

  1. 0
  2. 0.75
  3. 0
  4. 0.25
  5. 0
  6. 0
  7. 0
  8. 0
  9. 0
  10. 1