Add spaces: Hi,mynameisSonniaandIam20years.

Answer: Hi, my name is Sonnia and I am 20 years.

Add spaces: Youcanrunaslideshowtoautomaticallybrowseallimagesfromfoldersinthefull-screenmode.

Answer: You can run a slide show to automatically browse all images from folders in the full-screen mode.

Add spaces: Acountrymayhaveaconstitutionwithoutbeingademocracy-anexampleofsuchaconstitutionmightbeonestatingthatthisisanabsolutemonarchy,orthatthepresidenthasfullsovereignty.

Answer:
A country may have a constitution without being a democracy - an example of such a constitution might be one stating that this is an absolute monarchy, or that the president has full sovereignty.