20) Are you leaving / Will you leave tomorrow? 21) People won't watch / are not watching TV in 50 years. 22) Helen will meet / is meeting John at 6 pm. 23) Be careful! The ladder will / is going to fall on you! 24) I think I will / am going to make a cake for the birthday party.

1. A safety net is a net to protect people from injury after falling from heights.
2. There were many sculptures in the park.
3. Marine Park is the name of a public park in the New York City.
4. An acrobat is an athlete who performs acts requiring skill and agility and coordination.
5. An orchestra was directed by a perfect conductor.
6. The band played for the whole night.
7. Players came out for warming.
8. Great artists of old time created paintings that still delight us.
9. A referee shal always be neutral to both parties.
10. Many screens were placed in the city so that everyone could follow the game.
11. The audience was respectful of the speaker's opinion.
12. They performed sheet music for full and string orchestra.
13. All musicians were extremely talented and we liked the concert a lot.
14. He works in the office half-time.
15. Popular singers took part in the charity events.
16. The job of whale trainers is very dangerous.
17. We were lucky to have a good guy during our trip to London.
18. Facebook presented a new feature which allows you to follow your visitors.
19. We went to the swimming pool after school.
20. The stadium was full of spectators.
21. Demonstrative evidence, exhibits and other physical forms of evidence used in court to demonstrate, show, depict, inform or teach relevant information to the viewer.
22. Lighting is what turns your home into a place for doing things you love.
23. My brother liked the performance of the tightrope dancer.
24. Musical instruments were created or adapted to create special sounds.

1. I would like to tell you about my favorite holiday!2. My favorite holiday is New Year.3.New Year  comes in the nights 31 of December - 1 of January at 12:00 p.m.4. I love this holiday because in the New Year the whole family gathers in the same house and discuss the best moments of this year.5. In the new year people are give presents to each other.6. New Year in Russia is Putin's holiday congratulation. 7. In the New Year the whole family in the collection and dress up the Christmas tree.8. Also if you behave yourself then Santa can bring a present under the  Christmas tree.9.In order to appease Santo you need to retain biscuits with milk under the Christmas tree. 
Всё, НО СТОИТ ПЕРЕПРОВЕРИТЬ.