American accent and natural speed please.
1. The accident happened last Sunday afternoon.
2. It was hot in the room, so I opened the window.
3. We enjoyed our vacation last year. We stayed at a very nice place.
4. We did a lot of work yesterday.
5. When I was a child, I wanted to be a doctor.
6. I already paid the bill.
7. Yesterday it rained all morning. It stopped at lunchtime.
I know you asked for US voices, but I thought you might like another accent? Hope it's useful :)