My school doesn't allow tank tops, which I think is perfect for these shorts. I think probably a solid color shirt would look best with these. I'm not sure.
Most Helpful Guy
A tank top would make the outfit look like workout clothes in my opinion. So you could wear a loose fitting shirt like others are suggesting or any regular t-shirt. Really anything casual would go with them.
Most Helpful Girl
I think literally any color tee or tank would go with that