Les champignons et les chataignes

Bonjour,

Thank you for this fun little story about the fall. Just a couple of questions: 

I wrote "devenir malade" which was marked as wrong. I understand that "tomber malade" is a common expression, but couldn't you use "devenir" as well as "tomber" or "etre"? 

Also, I used "soigneux" instead of "prudent". And, I believe "Je fais beaucoup d'attention" is correct, too.

Merci tout le monde,

Hilary