Будьте ласкаві, ісправте помилку. Программа зараховує my parents are working a lot як невірну відповідь.
Interesting, I'd say present simple makes more sense here... You won't say "I am reading a book very often", since it's a regular periodic action that's what present simple is for... But I guess you could find a context, like, "My parents are working a lot recently". Otherwise it sounds strange to me.
But I'm not a native speaker, would be glad if one provided their opinion :)
P.S. * виправте