Question

How long (have they been working или have they worked) on this project? She (hasn't been travelling или hasn't travelled) to Athens before. A new DVD store (has opened или has been opening) in our neighbourhood.

Answer 1

1. How long have they been working on this project.
2. She hasn’t traveled to Athens before.
3. A new DVD store has opened.

Answer 2

How long have they been working on this project? She hasn't travelled to Athens before. A new DVD store has opened in our neighborhood.