Here is the key for exercises following each chapter in L'Italiano Secondo Il Metodo Natura. Now that the audio is available for the exercises, you can expose yourself to a bit more comprehensible input or find better strategies of working with the exercises. You can now have the exercises read to you with the blanks filled, read along them or just use the attached pdf files to check your answers.
All the available chapters (audio) and key can be found here.
You can order leather-bound deluxe physical copies of L'italiano secondo il metodo natura from our shopify page here.