改句子I must admit that means my long-term efforts are successf

改句子I must admit that means my long-term efforts are successful
至少两处错误.无需翻译.并加以解释改动处的原因

I must admit that it means that my long-term efforts are likely to be successful.
分析：
I must admit（主句） that（宾语从句连接词）
it（从句部分的主语） means（谓语）
that （宾语从句连接词,） my long-term efforts are likely to be successful（宾语）