Complete the sentences with have , haven't …

1) You look happy . What has happened? — Oh, I have won the first prize. 2) Let's make a fruit salad . Have you bought bananas and apples? 3) The boys have already visited their sick friend , haven't they? 4) The tourist hasn't bought any souvenirs in the shop yet. 5) What have you done? — Ann has already translated the exercise and I have learnt the new words by heart. 6) Have the students written the test? — Not yet.