QUESTION: Fix punctuation: However if the blackjack dealer shows a good card such as a face card 10 9 or 8 then he is unlikely to bust and you should hit on any card under 17
ANS: However, if the blackjack dealer shows a good card such as a face card, 10, 9 or 8 then he is unlikely to bust and you should hit on any card under 17.

QUESTION: Fix punctuation: These flower pots can be placed on paved tracks and sites attaching to the walls of buildings or banisters
ANS: These flower pots can be placed on paved tracks and sites, attaching to the walls of buildings or banisters.

QUESTION: Fix punctuation: Phototherapy sometimes referred to as light therapy or heliotherapy has been acknowledged and practiced for thousands of years However understanding why different frequencies of light applied to the skin produces beneficial results is a more recent development
ANS: Phototherapy (sometimes referred to as light therapy or heliotherapy) has been acknowledged and practiced for thousands of years. However, understanding why different frequencies of light applied to the skin produces beneficial results is a more recent development.

QUESTION: Fix punctuation: This is a historic event It is the first time a Western nuclear power plant has been closed as a precautionary measure that is before a serious accident occurs Barsebck is only 20 km from Copenhagen capital of Denmark
ANS:
"This is a historic event. It is the first time a Western nuclear power plant has been closed as a precautionary measure, that is, before a serious accident occurs. Barseback is only 20 km from Copenhagen, capital of Denmark.