In this quiz, you are given 3 minutes to answer. The type of test is multiple choice, therefore it is least expected that you would leave blank in any numbers. Choose the correct answer as possible because some of the questions are bit tricky.
Thank you. Can I make a few corrections? In 4, Philadelphia is not a state. In 10, UK also shares the Iberian peninsula and, arguably, Andorra. In 14, none of the answers is correct as the Caspian Sea doesn't surround any country. You need to re-phrase the question. In 15, you should say "was not" rather than "is not", seeing as the USSR is past history.