someing must be 【】to stop this

someing must be 【】to stop this we must do someing to stop people from———— Action must be _____ to stop further pollution. Something must be done to stop wild animals ------(kill) you must be carefully to stop your finger from （cut) you must be tired.why not{ }a rest?A.to stop to have B.to st This Must be it must doing him we like stop this some measures must be taken to stop the abusing of our farml There Must Be More To Life Than This 歌词 steam must be running to play this game~ THERE MUST BE MORE TO LIFE THAN THIS