A
1 ago
2 from
3 for
4 since
5 when
6 How long

B
1 has happened
2 lived
3 died
4 has been

C
1 A  How long
  B it continued... from
2 A When did  
  B ended ... ago
3 A since
  B have changed since

D
1 We haven't spoken to Jane for two weeks.
  We last spoke to Jane two weeks ago.
2 Helen hasn't visited Rome for twenty years.
  Helen hasn't visited Rome since she was a student.
3 We last saw Mary two years ago.
  We haven't seen Mary for two years.
  We haven't seen her since she got married.

E
1 When did ...
  They first met ...
2 How long did...
  It took eleven months to make, from...
4 When did Anna and Douglas last meet?
  They last met ...
5 How long has ...
  She has been dead since 1993.