1. A: Have you studied (study) for the test?
B: Yes, I have.
2. A: What has she cooked (cook) for dinner?
B: She has cooked fish.
3. A: Has Dad bought (buy) the groceries yet?
B: No, he hasn't. He’s at the store now.
4. A: Have they arrived (arrive) yet?
B: No, they haven't.