三道英语句型转换、速度啊啊.

三道英语句型转换、速度啊啊.
We met each other three years ago(改为同义句)
____ three years ____ we ____ each other last time
In the past my father had no chance to go to college(改为同义句)
In the past my father had no chance ___ ____ to college
你有多久没有见到她了?
How long ___ you ____ her?