Question

past simple, present perfect or present perfect continuous. 
1) You (work) in the garden for three hours already. Go home and do your homework.
2) Nick is tired because he (watch) videos since two o`clock and he (see) two films.
3)Their parents (know) jack for fifteen years.
4)We repair our flat for half a month.
5) She (not change) her clothes yesterday evening.
6)Where you (meet) Mary and John the day before yesterday? Помогите, плизз......

Answer 1

1.have worked.2Has watched and has seen.3have known4.??????5.did not change.6did meet.