What's the tense?

Martina Gonzales ... in a rented flat since returning to Buenos Aires

• have stayed

• has stayed

• has been stayed

• has been staying

We ... in this hotel a couple of times before

• has stayed

• have stayed

• have been staying

• has been staying

All day the police ... motorists to ask them questions about the recent robbery

• have been stopping

• has been stopping

• have stopped

• has stopped

Great! The noise ... and I can focus on my work again.

• have been disappearing

• has been disappearing

• have disappeared

• has disappeared

I ... any Dickens's novels.

• have read

• has read

• haven't read

• haven't readed

I ... this book on astrophysics for hours and I'm still on page six.

• have read

• have been reading

• has read

• has been reading

Dr. Fletcher ... the same lecture to students for almost five years

• is giving

• has been giving

• have been giving

• was giving

I did 20 lengths of the pool today. I ... that far since I was at school

• haven't swum

• haven't swam

• haven't swim

• haven't been swimming