Why is it "il problemA"?
check this http://www.duolingo.com/#/comment/282962
she's saying "nella" !!!!!!!!!
I know I should have memorized the gender by now, but I could have sworn that the speaker said "nella" instead of "nel."
I went back and re-listened. It's definitely "nella".
Motore could be motor or engine
This speaker regularly pronounces nel as nella. I've commented on it before.