Which asl gloss represents the most conceptual accurate interpretation of "costs an arm and a leg?" ● arm, leg cost
● cost arm leg
● expensive***
● costs a lot of money

Anew start. america is land of opportunity

Doulingo is good. you can also watch movies that are in french, i am using this tactic  for japanese  and it a lot. listing to music with  french  lyrics would work well too because  you could absorb  the words while having fun.hope this ! : )