Choose the correct form: present perfect or present perfect continuous.

1) I ______these tenses for three weeks now. Do you think I have made any progress?
-have been practising
-have practised
2) Helen _______me you are seriously ill. Why didn't you tell me yourself.
-has been telling
-has told
3) ________ Your breath smells awful.
-Have you smoked?
-Have you been smoking?
4) I ______ her to be extra careful when opening the car door. I'm not really surprised to hear that she hit a pedestrian.
-have often told
-have often been telling
5) With this last sentence you________ the exercise.
-have been finishing
-have finished