Since "every" (as in every one) is singular (as opposed to "all"), shouldn't the quiz title be "Every Slavic Country's Shape"? Either that or "All Slavic Countries' Shapes"?
As an example, you would say either, "I've visited every Slavic country" or "I've visited all Slavic countries." You wouldn't say, "I've visited every Slavic countries."
Since "every" (as in every one) is singular (as opposed to "all"), shouldn't the quiz title be "Every Slavic Country's Shape"? Either that or "All Slavic Countries' Shapes"?
As an example, you would say either, "I've visited every Slavic country" or "I've visited all Slavic countries." You wouldn't say, "I've visited every Slavic countries."