她认为彼得去世是医生的错。
She believes it was the ___doctor's ___fault that Peter died.
她没来不是我的错!
It's not ___my ___fault she didn't come!
“是我的错,”我说,他回答道,“没关系,一切都好。”
"It's ___my ___fault," I said, and he answered, "Never mind, it's all ok."