Помогите, пожалуйста1Choose the correct form: present perfect or present perfect

Помогите, пожалуйста1

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

1) She
has been gossiping
has gossiped
about me, hasn't she? I can just feel it.

2) Our company
has been doubling
has doubled
its turnover over the past six months.

3)
Have you smoked?
Have you been smoking?
Your breath smells awful.

4) Pope John Paul II
has been visiting
has visited
more than 90 countries.

5) I
have done
have been doing
paperwork all day. In all, I guess I have signed about 65 letters.