It's a gamble to sign him up.
彼と契約するのは危険だ
It's a girl thing.
女の子のやることだから（あなたなんかにはわからない）
It's a go.
それで手を打とう
It's a good idea, only (that) we need to think carefully.
熟考の必要はあるものの妙案だ
It's a good job you didn't hit him.
彼をなぐらなかったのは上出来だった
It's a great [terrible, real] shame (that) ....
…とは実に残念だ
It's a job that just suits me.
私にぴったりの仕事です
It's a judgment on you for your sins.
悪いことをした罰だよ
It's a jungle out there.
そこは無法地帯だ
It's a lack of communication on their end.
彼らの方では意思の疎通がない
