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