QUESTION: Fix punctuation: This ruins the structure of the dance which is otherwise characterized by an alternation between ecclesiasticals and lay people
ANS: This ruins the structure of the dance, which is otherwise characterized by an alternation between ecclesiasticals and lay people.

QUESTION: Fix punctuation: They won the jackpot using random quickpick lottery numbers
ANS: They won the jackpot using random quick-pick lottery numbers.

QUESTION: Fix punctuation: Bear in mind that when you sign up for Google Apps for Education its for your entire institution not just you or your class
ANS: Bear in mind that when you sign up for Google Apps for Education, it's for your entire institution, not just you or your class.

QUESTION: Fix punctuation: 21 September 2012 Marie My
ANS:
21. September 2012 - Marie My