You can quote as many posts as needed. Just Quote, type your response and scroll to Quote the next post you want. You can also Quote from different pages as your unpublished message will carry over when you change pages (alot of members don't know this or how to, which results in staff having to merge them). If the quoted post has multiple questions that need answering, just go the end one the first one and hit return/enter and the Quote will split from where the text cursor was.
Like I just did with your one (except I cut and pasted after the split).