How to fix "?Itemid= in website address joomla"

in joomla cms There is a big problam. "duplicate content" and "duplicate URL"

for exam this url: http://bit.ly/31w2ZoW or url: http://bit.ly/2KTGlAK

Even by making the menu URL yet These URL has work! Or a much problam thing, itemid url has work! Even with sh404SEF extensions! this url for exam: ?Itemid=135 Even this url is works in joomla orginal website!

Now, how fix that? Where is the problem? tnx