Answer:
I'll only answer the ones I know, if someone knows the rest I didn't answer, they can comment under this answer
Idiom #1.2
"so dedicated to his craft"
Meaning: He is dedicated to get into the basketball team
Idiom #2.1 (you got this one wrong)
"Everyone in the class was in the same boat"
Meaning: Everyone is in a similar situation
Idiom #2.2
"The class let out a collective sigh of relief"
Meaning: Everyone was relieved
Idiom #3.1
"Everyone in Athens thought that the home team had the game in the bag"
Meaning: Everyone was assured of success
Idiom #4.2
"He felt like a fish out of water"
Meaning: He does not feel comfortable or relaxed because he is in an unusual or unfamiliar situation
That's all I know, I hope this helped you ;)
