0Hi,02br 02br 00Let's look at the noun 'uniform'. Is it countable? Can you count 'one uniform', 'two uniforms', so on? I think you can.02br 02br 00Thus, the second sentence should be:02br 02br 00The policeman wears a uniform. 0-
0Hi,02br 02br 00It depends on the context, but I think that in most cases you'd use #1.02br 02br 00Your grammar is also a little awkward. The definite article suggests that you are talking about a specific policeman. The present tense suggests that you are describing his habits/routine. That all seems like something you would seldom want to talk about.02