The last time they had dinner at that restaurant was five months ago
-> They haven't ________________________________________
The last time I wrote to Mary was seven years ago 
-> I haven't ___________________________________________
The last time I played football was in 1970 .
-> I haven't ____________________________________________
When did you start learning English .
-> How long ____________________________________________
When did you first meet the woman ?
-> How long ____________________________________________
When did you first know that teacher ?
-> How long 
When did you see that film ?
-> How long _____________________________________________
My father hasn't seen my uncle for nearly 20 years 
-> It's _________________________
Chirstmas was the last time we had a party 
-> We 
They hasn't visited Peter since last year 
-> He didn't 
It is three years since I last saw them 
-> I haven't _________________________