Question

is that man_____European?(a,the

Answer 1

In the blank space, it can be both "a" and "the" depending upon the context.

Since in European, the E is silent, that's why, istead of "an", it will be "a" i.e. is that man a european?

On the other hand, if the context revolves around one particular person, then "the" will be used in this case.

Answer 2

is that man _a_ European

because we are not referring to a proper noun