Ау,ну решите пожалуйста, я не знаю как надо делать!!!
Запишите в Passive Voice.
1. He presented the collection together with the building to his city.
2. This is the official residence of the President of the United States of Amerika.
3. Its construction began in 1957 and finished 1 years later.
4. You can see the British Crown Jewels there.

The collection together with the building to his city was presented by him.

The official residence of the President of the United States of America was being this.

Construction was began in 1957 and was finished 1 years later.

The British Crown Jewels there can be seen.