I GIVE UP..... THREE HOURS ON THIS ONE LESSON AND YOU KEEP ADDING NEW WORDS . WHY DO YOU NOT ALLOW ME TO PRACTICE THE VERBS ETRE AND AVOIR. I AM SOOOOOOOO FRUSTRATED. That felt better. This is tough for people with ADHD.
Each lesson, and the main screen, has "practice again" buttons (I forget what they are labeled). You can do these for as long as you want before you move on to a new lesson. So don't lose heart, follow your own pace!
I decided to stop moving ahead and struggling, and to keep using practice exercises until it begins to stick in my brain better. Also use Google Translate in tandem to check some of my responses... not that they always agree.