You are very welcome. I have studied Spanish for longer than I care to admit, and I still have that problem of literal translation. Fortunately, as you learn, that will become less of a struggle even if it continues for a long time.
It's "la cosa" singular and "las cosas" plural. I don't think it'd be proper English if "haces las cosas" was translated as "do the things", therefore, it's translated as "do things". In Spanish however it's proper to have articles pretty much wherever possible.