How did I get half of this wrong?

Question

Okay. I'm really confused. How did I get half of these questions wrong. I know Spanish. But yet, I got some of these questions wrong.

Answer

If any of you have any idea how I can get better on Spanish. Then please let me know.

Answer

Hola IzabellaWe recommend that once you get the feedback from your test you add those lessons were you got it wrong to your notebook, read the lesson and re-test. You will notice the progress that way.SaludosInma

Answer

Even I am so confused but I still don’t get all of them right

Answer

Because, applications like this enjoy obfuscating and creating confusion.  There is zero clarity here.  Sometimes you use an article sometimes you do not.  It depends on who is speaking.  It depends on the weather.  It depends on - something else other than what you are thinking.  I find this stuff less than helpful to the nth degree.  Or perhaps just to nth degree - without the article.  Who know?

Answer

Don’t use an article if you are just saying what someone is.“Es medico”.

But use an article if you are also using an adjective. “Es un medico bueno”.

Also use an article if you add any other information. “Es un medico que vive en los estados unidos.”