I have decided her for her mistake everyone makes mistakes in life.
A. forgiving; but
B. to forgive; when
C. to forgive; since
D. forgiving; until
网友回答
A. forgiving; but
B. to forgive; when
(答案→)C. to forgive; since
D. forgiving; until
解析：C “决定做某事”decide to do sth.,since“既然在哪，因为”。“我已经决定原谅她的错误了，因为在生活中，每个人都会犯错误。”根据句意和固定搭配选C。