QUESTION: Fix punctuation: The probability of winning the US Open in 2012 by Roger Federer is still very high
ANS: The probability of winning the US Open in 2012 by Roger Federer is still very high.

QUESTION: Fix punctuation: Users who are inexperienced with adware and do not know how this malware works might have no clue that NiceDeal is a security threat that requires removal
ANS: Users who are inexperienced with adware and do not know how this malware works might have no clue that NiceDeal is a security threat that requires removal.

QUESTION: Fix punctuation: But there have not been that many chicks as expected from the greater number of adults
ANS: But there have not been that many chicks as expected from the greater number of adults.

QUESTION: Fix punctuation: We stay for a few carols and then walk on After a moment we meet a colleague from the cement plant in Aalborg small world
ANS:
We stay for a few carols and then walk on. After a moment we meet a colleague from the cement plant in Aalborg - small world.