Present Perfect vs Past Simple

Ann ..........in Spain when she was a student.

I .........there for the first time last Saturday.

I bought this carton of milk a week ........

Ann and Ben ..........awake since 6 o`clock.

Richard has worked as a chef .......four years.

............ the shopping yet?

It`s been really hot ...... yesterday.

We ........ this cafe lots of times.

I ....... my work. Can I go, now ?

Mandy .....on a new book at the moment.

We ............two days ago.

We .......... already lots of things.