QUESTION: Fix punctuation: Just enter the details of the flights you require and then choose a suitable flight
ANS: Just enter the details of the flights you require and then choose a suitable flight.

QUESTION: Fix punctuation: And taking advantage of the diversion we slipped past the guards and set off in the direction of the Winter Palace
ANS: And taking advantage of the diversion we slipped past the guards and set off in the direction of the Winter Palace.

QUESTION: Fix punctuation: If the baboon refused to eat any piece of fruit or a root it was probably poisonous or tastes really awful
ANS: If the baboon refused to eat any piece of fruit or a root it was probably poisonous or tastes really awful.

QUESTION: Fix punctuation: Infantile autism or autistic syndrome is a usually chronic disability permit that shows itself during the first years of life
ANS:
Infantile autism or autistic syndrome is a usually chronic disability permit that shows itself during the first years of life.