I don't understand how its possible to do these questions so fast.

I just commented on the last skill builder about something not clicking and then all the sudden for this one it did in fact click and went 5/5. Lets flipping go

Something seems to not be clicking for me here. The last few skill builders I have been super confident but consistently missing 1 or 2 questions and not understanding why. I get its depending on sufficiency vs necessity conceptually but I'm just not seeing it when I go and do the practices for some reason. Its so obvious when watching the videos but I keep slipping up when I actually try.

I'm so lost on 4

Its been like 10 years since I thought about grammar and I can TELL...