Preselection test practice (in case you can't find it)

Texts for rapid reading comprehension

http://youngdip.blogspot.it/2016/12/texts-for-rapid-reading-comprehension.html

plus anything else you find by doing a search on google for:

'C1 texts for multiple choice reading comprehension' or something similar

I found: https://www.usingenglish.com/comprehension/advanced.html

and chose this:

https://www.usingenglish.com/comprehension/9.html

International Current Affairs quizzes

http://youngdip.blogspot.it/2016/09/international-current-affairs-quizzes.html

plus anything else you find by doing a search on google for:

'international relations quiz'

I just got: http://blog.oup.com/2015/11/foreign-affairs-quiz-2014/

and https://inquiry.princetonreview.com/grad/internationalaffairsquiz/default.asp

or try adding a topic or institution. For example:

'international relations middle east quiz' gave me:

http://www.aish.com/jw/me/Quiz-Political-Change-in-the-Middle-East.html

or geography? 'European geography quiz' gave me:

http://lizardpoint.com/geography/europe-quiz.php

or history? 'Modern European history' quiz gave me this:

http://www.raleighcharterhs.org/faculty/bnewmark/euroquizzes.html#WWI

I found this: http://www.raleighcharterhs.org/faculty/bnewmark/euroquizzes.html

which gave these:

http://www.raleighcharterhs.org/faculty/bnewmark/Euro%20Quizzes/WWIRnRev.htm

http://www.raleighcharterhs.org/faculty/bnewmark/Euro%20Quizzes/PostwarWorldII.htm