Complete the sentences with have, haven't, has or hasn't. 1.you look happy . what happened ? -oh, worn the first prize. 2.let's make a fruit salad. you bought bananas and apples? 3.the boys already visited their sick friend, they? 4.the tourist bought any souvenirs in the shop yet. 5.what you done? - ann already translated the exercise and i learnt the new words by heart. 6. the students written the test? - not yet.

1.you look happy . what has  happened ? -oh,i.have   worn 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.

решение:

1) has, have

2) have

3) have, haven`t

4) hasn`t

5) have, has, have

6) have

1. you should  try to find out as many facts as possible about this expedition to the antarctic. 2. the team of experts is to analyze the present situation connected with our city's ecological problems. 3. the young engineer was allowed to apply the mobile equipment in his field experiments. 4. this production process had to be further improved by new technical means. 

1. вы должны попытаться узнать так много фактов насколько возможно об этой экспедиции в антарктику. 2. команда экспертов должна проанализировать текущую ситуацию, связанную с экологическими проблемами нашего города. 3. молодому инженеру разрешили применить мобильное оборудование в его полевых экспериментах. 4. этот производственный процесс должен был быть далее улучшен новыми техническими средствами. 

вроде правильно, но не уверена, а перевод