Remind me when we learned that "is" means "even"? So it does show up as a hint, but up until now I've never encountered it meaning anything but "too/also", so it seems kind of unfair to suddenly drop it here and expect us to be able to differentiate its meanings.
"Are there also cold seas by Australian cities?" I think this should be accepted. Also, this is overall a great site. Learning the basics of spoken Hungarian is no small task. Keep up the good work. --E.L.P.