Prepositions - Upper intermediate

After payment, you'll receive the product (a)   10 business days.

My grandparents lived in that same house (a)   ages.

He's Italian? For some reason I was (a)   the impression that he was Spanish.

Where's Roberta? She should have gotten here (a)   now.

We've put a lot of effort (a)   this project.

We drove (a)   the coastline of RIO.

The scientist made an amazing discovery (a)   accident.

He died (a)   his country.

You must ask apology (a)   him

Let’s discuss (a)   the ways of improving the basic skills of English.