Put the verbs into Past Simple or Pretent Perfect.
exemple  While I was waiting for the bus, I  MET ( meet) my old friend.
1) ________(you/write) the letter yet.
2)What time ________ (you/arrive) at school this morning? 
3)We_________ (just/come) back from our holidays.
4) I ________(know) Jack for three years.
5) ________( you/see) the film ^^Shreck^^? Yes, I_________(see) it last Wednesday.