Условие задания:

5 Б.
Choose the correct form: present perfect or present perfect continuous.
1)  I 
    these tenses for three weeks. Do you think I have made any progress?
2)  Our company  
    its turnover over the past six months.
    Your breath smells awful.
4)  I  
    her to be extra careful when opening the car door. I'm not really surprised to hear that she hit a pedestrian.
5)  I  
    paperwork all day. In all, I guess I have signed about 65 letters.