"Posso fazer o almoço para eles?" is the article "o" optional or wrong here? (I tried this and was marked wrong)
No problem. We'd understand that the same way. But "posso fazer almoço para eles" wouldnt be so specific... on the contrary, "posso fazer o almoço" would be more specific, for instance "posso fazer o almoço para eles hoje?" But thats nota rule....
Is this how a question sounds?
No. I'm brazilian and I thought it was an affirmation.