the old man died 10 years ago同义句转换

问题描述:

the old man died 10 years ago同义句转换
Three months( )( )since the old man( )

Three months(have )(passed )since the old man( died )
句型上应该是这么填,不过为啥上面是10年,下面就变成3个月了啊可能是题打错了,不清楚,卷子上是这样