Which interrogative sentences are correct? 8.1. When have these buildings been built?
2. When were these buildings built?
3. When did they build these buildings?
4. When did they built these buildings?
5. When they will build these buildings?
9. 1. When will these articles be translated?
2. When were these articles translated?
3. When did these articles translate?
4. When did they translate these articles?
5. When they will translate these article?

Мое сердце - в горах, мое сердце - не с вами:
За оленем бежит и крадется за ланью;
Мое сердце - в горах, вы не верьте глазам;
Мое сердце - в горах, где бы ни был я сам.

До свидания, горы, мой Север, прощай!
Ты - достоинства, чести и доблести край!
И куда бы скитанья меня ни вели,
Горы, вам признаюсь в бесконечной любви.

До свиданья, укрытые снегом вершины,
До свиданья, зеленые дали-равнины,
До свиданья, леса и дремучие чащи,
До свидания, грохот потоков бурлящих! 

Мое сердце - в горах, мое сердце - не с вами:
За оленем бежит и крадется за ланью;
Мое сердце - в горах, вы не верьте глазам;
Мое сердце - в горах, где бы ни был я сам.

I want to build a water park in Kaliningrad, because there is no good water park. The project was created with the help of foreign experts from Germany, Poland, Lithuania and France. In construction participating builders from different countries, such as Norway, Finland, Russia . 

Most recently, we built the first water slide. Currently under construction are two water slides. The plans to build another five slides and 3 pools for people who already know how to swim, 2 pools for those who want to learn to swim and 1 pool for children. 

We also need to build changing rooms, showers, toilets, saunas. We also plan to open a coffee shop, what would people after swimming to rest after drinking the juice or coffee. 

In the future we hope that this will become a popular water park that would relax with family and enjoy the time spent.