QUESTION: Fix punctuation: Over 20 years of Berg Toys experience are reflected in this gokart
ANS: Over 20 years of Berg Toys experience are reflected in this go-kart.

QUESTION: Fix punctuation: The innovative mold concept and the complex automation solution dispense with joining techniques and downstream assembly
ANS: The innovative mold concept and the complex automation solution dispense with joining techniques and downstream assembly.

QUESTION: Fix punctuation: Make sure to always consult a doctor or other competent therapist about your illness
ANS: Make sure to always consult a doctor or other competent therapist about your illness.

QUESTION: Fix punctuation: Particle pollution is one of the major environmental problems
ANS:
Particle pollution is one of the major environmental problems.