QUESTION: Fix punctuation: From passive loyalty to the Revolution the Cossacks have passed to an active political offensive against it
ANS: From passive loyalty to the Revolution the Cossacks have passed to an active political offensive (against it).

QUESTION: Fix punctuation: The problem is that you may not fully realise that it is you yourself who are changing You may blame your unhappiness on a loved one who seems to be moving away from you or seeking affection elsewhere
ANS: The problem is that you may not fully realise that it is you yourself who are changing. You may blame your unhappiness on a loved one who seems to be moving away from you or seeking affection elsewhere.

QUESTION: Fix punctuation: The report highlights a particular lack of progress in opening up energy markets where 14 Member States have yet to properly transpose the EUs third energy package into national law two years after the deadline
ANS: The report highlights a particular lack of progress in opening up energy markets, where 14 Member States have yet to properly transpose the EU's third energy package into national law - two years after the deadline.

QUESTION: Fix punctuation: The Welsh Mountain Sheep can be termed as an umbrella description to describe many of the breeds indigenous to Wales Through breeding and selection over the centuries the Welsh Mountain has developed into many distinct breeds the Balwen Welsh Mountain Sheep being one of these Balwen Welsh Mountain Sheep originate from one small area of Wales the Tywi Valley
ANS:
The Welsh Mountain Sheep can be termed as an umbrella description to describe many of the breeds indigenous to Wales. Through breeding and selection over the centuries, the Welsh Mountain has developed into many distinct breeds; the Balwen Welsh Mountain Sheep being one of these. Balwen Welsh Mountain Sheep originate from one small area of Wales: the Tywi Valley.