Wordformation 8 - prefix

He said it was (a)   to win the game. (POSSIBLE)

I had to (a)   because I started to feel anxious. (APPEAR) 

It was (a)   but we did it anyway. (LEGAL) 

It was so (a)   from her. (EXPECTED) 

I have to (a)   with you. (AGREE) 

His words were so (a)   for our argument. (LOGICAL) 

I was (a)   to walk after the surgery. (ABLE) 

I don´t eat (a)   anymore. (HEALTHY) 

His song was at first so (a)   but then it turned into a hit. (POPULAR) 

Our relationship was (a)   (OFFICIAL)