প্রশ্ন সংশোধন করুন
প্রশ্ন:
Great earthquakes usually begin with slight tremors but ---- take the form of one of more violent shocks, and end in vibrations of gradually diminishing force a called aftershocks.
Great earthquakes usually begin with slight tremors but ---- take the form of one of more violent shocks, and end in vibrations of gradually diminishing force a called aftershocks.