1 wrote 
2 am not meeting 
3 didn't do
4 have known 
5 lost

1.she (write) was writing a letter last night 
2.until now, i (not/ meet) am not meeting my father
3.he (not/ do) didn't do his homework last week
4.we (know) have knowm Mary since she arrived here
5.this is the second time he (lose) has lost his job